sorry but i cant post it all as i own more then 70 ps1 games around 25 ps2 games 20 gc games and 14 wii games

I'll do only this gen

DS
Animal Crossing wild world - fan of animal crossing
Brain Training - Looked interesting
Elite beat Agents- played the demo and It was a must buy cause I had a lot of fun with it.
Mario and Luigi 2 - Played the first one, not as good though imo
Mario Kart DS - Fan of Mario kart
My Word coach - not sure why
New Super Mario Bros - Mario platform fan
Nintendogs - Just wanted to pester the dogs
Pokemon Diamond - Pokemon fan
Pokemon Blue MD - again Pokemon fan
Sonic Rush - Sonic fan
Sonic Rush Adventure - played rush, loved it and had to buy the sequel
Mario 64 DS - Mario Platform fan
Wario ware touch - Fun!!!

Wii
Mkwii- Really Fun :)
SMG- Mario platform fan
SPM- Mario RPG fan
Brawl- MUST BUY
Zelda TP - Zelda fan
Wario ware smooth moves - FUN!
Wii sports - it came bundled...

Good Lord, I couldn't even tell you which games are in my possession right now, much less which ones I own. Between renting, trading in, loaning to friends, borrowing from friends, etc. my game collection is completely disjointed. I think I probably have about 30 games right now but I'm not really sure.

This would take way too much time since I have over 500 games in my collection, granted 300+ are pre-Gen 5 but the other 200 or so... I just don't have that kind of time.

Sonic the Hedgehog: Awesome game on the Master System.
Sonic the Hedgehog 2: Another awesome game on the Master System.
Sonic the Hedgehog: Port of Master System game on the Gamegear.
Sonic the Hedgehog 2: Port of Maser System game on the Gamegear.
Sonic the Hedgehog: Because it's the original Sonic, that started it all. By the way, how hard was it to come up with different names? I mean, come on. How many games do we need, named Sonic the Hedgehog? It's retarded.
Sonic the Hedgehog 2: Because it feels most like a Sonic game and it made the debut for Tails, who also kicks ass.
Sonic CD: Sonic the Hedgehog. On CD. In the early 90's. You can't argue with that. Oh, it also kicks ass.
Sonic the Hedgehog 3: Another classic, but I hate Knuckles.
Sonic & Knuckles: Another good game, minus Knuckles.
Sonic 3D Blast: Hey. Shut up. It's good. The music is awesome. Woopteedoo if you think the isometric style is awkwardly perspective, because if you know the game, and you're good at it, it's no big deal at all, and it's fun.
Sonic Xtreme: Where the fuck are you? It would have been mine, if it was released.
Sonic Adventure: Awesome 3D Sonic game. Sonic was good in 3D before Heroes. Some minor problems, but hey, all games have minor problems.
Sonic Adventure 2: Another good game. The last of the good ones. Strays a little too far from the series, but it still kicks ass.
Sonic Heroes: I wanted to see how bad it is, and boy, it's bad. The beach-inspired theme song foreshadowed the entire thing, and they grouped them together like they're nothing but colors. And why are they so shiny, damn it? They look like wet candy. It just sucks. And Tails sounds like a 5 year old. It's horrendously annoying. I just want to rip his voice box out and nail it between two rocks. Just, UGH!!
Shadow the Hedgehog: I wanted to see how bad it is, and boy, it's bad. Like, how bad? The worst Sonic game ever? Unassailably. But it doesn't stop there. No. This game is badder than the baddest bad. Why does Shadow carry guns, and drive vehicles? What happened to chaos powers, huh? Can't he run faster? It makes as much sense as Kirby sucking up enemies with a giant vacuum. And why do they have to be called black aliens? Why not just, aliens? For obvious reasons, come on.
Sonic the Hedgehog: Not Sonic the Hedgehog. Not Sonic the Hedgehog. But Sonic the Hedgehog. One of the worst video games I've ever played in my entire life. I'm currently reviewing it, and I bought it at first, because I also wanted to see how bad it is, and yet again, boy is it bad.
Sonic Advance: Proves that 3D did not kill Sonic. Needed it for my Sonic collection. It's meh.
Sonic Advance 2: Another meh.
All other Sonic games I don't care to mention: To complete the collection.

Super Mario Bros.: YEAHHHHH SUPER MARIO BROS.
Super Mario Bros. 2: Awesome game. Better than the original, because it's so much harder, and funner. Looks the same, though.
Official Pirated Version of Doki Doki Panic: Meh. Okay game on the NES. Not a true Mario game, though.
Super Mario Bros. 3: Instant classic. Best game on the NES! Ever!
Super Mario World: My first video game. It's overflowing with nostalgia.
Super Mario 64: One of the best games ever. Mario is king in 2D, and 3D.
Super Mario Sunshine: I'm sorry, but this game is just way too fun. TOO FUN.
Super Mario Galaxy: Best game ever. A little easy, but it's still the best.
Super Mario Land: Mario on GB. It's okay.
Super Mario Land 2: Another okay Mario game.
New Super Mario Bros.: First Mario platformer, that doesn't start with an "S."
Mario Party: Good party game.
Mario Party 2: Another good party game.
Mario Party 3: Can't beat Mario party. But do we really need 3? Meh. Makes it a trilogy.
Mario Party 4: Well, I guess we need at least one for the Gamecube.
Mario Party 5: I guess Ninty's pulling a "three-per-console" thing. But seriously, 5 is enough damn it. Stop.
Mario Party 6: Okay. You have your double trilogy that mirrors N64 and GC. STOP IT!
Mario Party 7: DAMN IT! STOP IT! IT'S ENOUGH ALREADY!
Mario Party 8: Okay, fine. One for the Wii. That's enough!
Mario Party Advance: Why? WHY?
Mario Party DS: (Sigh)
Mario Tennis: Good game.
Mario Tennis: I said, good game. Oh wait, this is for GBC. Change the names, damn it.
Mario Tennis Cubed: I think it's Power Tour or something. I don't really know. Meh. Whatever.
Mario Tennis Advance: It's not called that. It's called something else.
Mario Golf: Yes.
Mario Golf: Yeah.
Mario Golf Cubed: Something else.
Mario Golf Advance: Not called that.
Mario Soccer: Should have been called that. But wait. That whole Europe fuck up would just confuse everything.
Another Mario Soccer: Yeah.
Mario Basketball: Now there's no excuse for that one.
Mario Dancing: I dunno. Some dance dance revolution thing-of-ma-jig. Yeah...
Mario Football: Thank you, it doesn't exist.
Mario Hockey: Could you imagine?
Mario Ironing: No.
Hotel Mario: Horrible game.

Okay, you know what? Seriously. It's taking way too long.

I'll only do PS3 games because I am lazy (only 3 PS2 games were bought for my collection, and I have sold many, but I bought those games because I thought they were good)

Call of Duty 4: Amazing reviews
Grand Theft Auto IV: Amazing reviews, and I have played previous GTAs and loved them
Uncharted: ND
Ratchet: Insomniac, great demo
Resistance: great reviews, great demo
Blazing Angels: love flight games
Lego Star Wars: love LGS games and it was cheap
Eye of Judgement: I don't know
Virtua Tennis: It looked good
Tony Hawk's: my brothers
Rainbow Six Vegas: great reviews, I had not bought a game in a few months
Rainbow Six Vegas 2: RSV
Ghost Recon Advanced Warfighter: great reviews and RSV
Motorstorm: Looked lovely, and I had played it before I got my PS3
Burnout Paradise: Fantastic demo, and good reviews
Folklore: my friend gave it to me
Gran Turismo 5 Prologue: Cheap, I like GT HD
Warhawk: Looked amazing to me
The Orange Box: my brothers
Lost: because it is a lost game, and I love lost

I have way too many games to name. I haven't even updated my "My Games" section yet since it is time consuming. I will tell you which systems I have the games for thought.

NES
SNES
GC
Wii
GBA
DS
PS1
PS2
PS3
PSP
360

I'll just stick with my current console...

Resistance Fall of Man- Bundled with the PS3, but i would have bought it anyway as it was labelled THE game to have at launch

Motorstorm- Again bundled, but i wasnt sure whether to get this or the f1 game. Turns out i made the right choice

Pro Evo 2008- I love the pro evo series, but this was a crushing disappointment from the first game i played

Fight Night Round 3- My mate said the graphics were astonishing, and my word they are

COD4- Just because it seemed the right thing to do

Lego Star Wars- I love lego, and Star Wars, so there you go!

COMING SOON- MGS4, Uncharted, Assasins Creed

I think i've got far too many games to run through at the moment; one game that isnt in my collection but i wish was is Rock N roll racing for the SNES. Oh my GOD the best game ever made.

I'll stick with current-gen ok?!

Wii:

Zelda TP: Only great launchgame besides Wii Sports.

Super Mario Galaxy: It's Mario.

Brawl: Want good fighting games?! Here's your chance.

Mario Kart: Online, co-op, timetrial, timesharing... Mario Kart + online = killer.

No More Heroes: I like Suda51.

The Godfather: Blackhand edition: Great controls, liked this game very, VERY much.

SSX Blur: Great snowboarding franchise exclusive Wii version = must buy!

Wii Sports: Pack-in... Fun game, while it lasts.

Guitar Hero 3: Great music game.

Mario Strikers Charged: I think it's more fun then Fifa or PES, eehrm... I live in Europe, so!

Metroid Prime 3: Ending of a great trilogy!

Table Tennis Wii: Support Rockstar's Wii games, also... Quite a fun game, only cost me 20 euro's.

Super Paper Mario: Haven't touched it but got great reviews, eehrm... Gamecube game was awesome!

Wario Ware: Lol, eehrm... Lack of great games after launched caused me to buy 'good but not so great' games. Still fun though!

PS3:

The Orange Box: Game got great reviews, this version was supposed to have framerate issues, EA released a patch... And the game is so good it doesn't bother me! Best game i.m.o for the current-gen!

Call of Duty 4: Best FPS available (not arguable, just The best!). Great reviews, great online etc...

Assassin's creed: Hype, and needed a game when I got my PS3...

GTA4: Duuuuuh...