Wii:
Super Mario Galaxy
Super Smash Bros. Brawl
No More Heroes
Zack & Wiki
Resident Evil: Umbrella Chronicles

PS3:
Devil May Cry 4
Call Of Duty 4
Assassin's Creed
Heavenly Sword
Resistance: Fall Of Man.

WII (It's my only system)

1.- Smash Bros. Brawl
2.- Super Mario Galaxy
3.- The Legend of Zelda: Twilight Princess
4.- Resident Evil 4: Wii Edition
5.- Wario Ware Smooth Moves

Wii best games:

-Metroid prime 3
-Resident Evil 4
-Super Paper Mario
-Medal of Honor: Heroes 2
-Super Mario Galaxy

(in Italy SSBB and No More Heroes yet to come...)

Wii

SSBB
SMG
SPB
Wario
MP3

Honorable Mention: MP8 (only game I can get my wife to play) and TPO (Tamagouchi Party On -- Actually I was surprised my five-year-old son wanted to play it when I got it on a lark and ended up keeping it. But don't worry about him too much as he played Brawl and Galaxy with me too).

Mike from Morgantown

Wii
-Smash Brothers,
-Super Mario Galaxy
-Metroid prime 3
-Super Mario Galaxy
-Wii play.

Nintendo Wii:

1.)Zelda: TP
2.)Super Smash Brothers: Brawl
3.)Super Paper Mario
4.)Super Mario Galaxy
5.)Resident Evil 4

Playstation 3:

1.)Ninja Gaiden Sigma
2.)Ratchet & Clank Future: TOD
3.)Devil May Cry 4
4.)Call of Duty 4
5.)Uncharted: DF

Xbox 360:
1.)Mass Effect
2.)Lost Odyssey
3.)Devil May Cry 4
4.)Eternal Sonata
5.)Call of Duty 4

Nintendo DS:

1.)Megaman ZX
2.)Yoshi Island DS
3.)Megaman ZX Advent
4.)Final Fantasy III
5.)Digimon World DS

PSP:

1.)Dark Stallkers
2.)Megaman x
3.)Megman
4.)Street Fighter Alpha 3 Plus
5.)Ape Escape

SSBB
SMG
TP
Strikers
Metroid

Now that I received my latest Wii games...

Wii
1. Fire Emblem : Radiant Dawn PAL (yay for fully crappy localized dub, and not crappy english dub)
2. No More Heroes US (yay, because it's also fully translated, despite being the US version through FreeLoader, so it's definitely the superior version)
3. Trauma Center : Second Opinion PAL (crappy english dub with subtitles)
4. Sonic and the Secret Rings PAL (japan dub, translated subtitles: perfect)
5. Mario Party 8


PS3 is by default, as I don't really have games I want for it, playing mostly PS2 games on it

PS3
1. Heavenly Sword
2. Formula 1 Championship (still wrapped up)

Playstation 3

1. Everyday Shooter
2. Uncharted
3. Warhawk
4. Super Stardust HD
5. Motorstorm

XBox 360
1. Call of Duty 4
2. Bioshock
3. Lost Oddessy
4. Halo 3
5. Gears of War

Wii
1- Fire Emblem: Radiant Dawn
2- Metroid Prime 3: Corruption
3- Mario Party 8
4- Tony Hawk's Downhill Jam
5- Super Smash Bros Brawl

PS3
1- Tony Hawk Project 8
2- Resistance Fall of Man