Two questions:

1) What gaming systems do you or have you own/owned?

2) What was your favorite game on that respective platform? (ONE game only please)

If you can list the consoles in the order you got them :)

My answers.

PlayStation - Spyro the Dragon: Year of the Dragon

Game Boy Color - Zelda: Oracle of Ages

PlayStation 2 - GTA: San Andreas

Game Boy Advance - A Link to the Past 

GameCube - Paper Mario - The Thousand Year Door

PSP - GTA: Liberty City Stories

Xbox - Doom 3

Xbox 360 - Mass Effect 2

PlayStation 3 - The Last of Us

Wii U - Super Mario 3D World

3DS XL- A Link Between Worlds 

Gameboy Color and PSP are the only two that I've sold off and no longer own.

Yikes.. naming a favorite game for each console is gonna be rough, but I'll try and name all my consoles.

NES, SNES, N64, Gamecube, Wii, Wii U, Game Boy, Game Boy Colour, Game Boy Advance SP, DS, DSlite, 3DSXL, Master System, Genesis 2, Saturn, Dreamcast, Game Gear, PS2 Slim, PS3 Slim, Xbox, 3DO, TurboGrafx-16, Pong, Telstar, ColecoVision, Intellivision, annnnd...I think that's all of them.

nes
still have it
metroid

snes
disappeared
super metroid

n64
sold it last year
mario 64

playstation
sold it the year i got it
i used it as a cd player

Dreamcast
still have it
soul calibur

gamecube
still have it
super mario sunshine

xbox
still have it
morrowind

ps2
still have it
rygar

wii
sold it last year
scarface

x360
still have it
obivion

ps3
still have it
red dead redemption

pc
still have it
skyrim

Wii U
all i do everyday
Darksiders II

GB-Pokemon Silver
N64-LoZ OoT
Wii-SSBB
DS-Pokemon Diamond
WiiU-So far nothing (probs would be WW HD if I owned it)

PS1-Crash Bandicoot 3
PS2-FFX
PS3-FFXIII
PSV-P4G

Atari 2800 (I think)-Pong

Edit: 3DS-Pokemon X (cant believe I forgot that, its sitting right next to me)

SNES - Starfox

Megadrive - Gunstar Heroes

PS1 - Crash Bandicoot

N64 - Banjo Kazooie

GCN - Resident Evil 4

PS2 - Shadow of the Collosus

Xbox - Halo 2

360 - Bioshock

Wii - Mario Galaxy

Wii U - Mario 3D World

(Note: as my all time favourite game, RE4 would have won for Wii and PS2 as well, but that would be boring, so I went with their next best)

tagged for when I have the time to do this......

In order:

N64 Paper Mario)

 Gameboy Color (Pokemon)

 Gameboy Advanced (Pokemon)

PS2 (SOCOM: CA)

Gamecube (Paper Mario: TYD)

 PSP (MGS:PeaceWalker)

Genisis (Sonic)

PS3 (Demon's Souls)

PC (AOE: III)

Vita (Uncharted)

PS4 (Killzone)

Here's mine:

Atari 2600 - Spider-Man
Genesis - Street Fighter 2: SCC
SNES - Mario Kart
PlayStation - Final Fantasy 7
N64 - Mario 64    (or maybe Zelda: Ocarina of TIme, or maybe Goldeneye)
Dreamcast - Soul Calibur
PlayStation 2 - Grand Theft Auto III
GameCube - Zelda: Wind Waker
Xbox - Project Gotham Racing 2
PSP - God of War: Chains of Olympus
Xbox 360 - Gears of War
PlayStation 3 - Uncharted 2
DS - Zelda: Phantom Hourglass
PlayStation 4 - NBA 2K14
Wii U - Super Mario 3D World

For my consoles, picking a single title is leaving so many beloved titles behind. For handhelds (PSP/DS), I hardly played them so I don't have a lot of favorites.

PS1 - Final Fantasy IX
PS2 - Shadow of the Colossus
PS3 - The Last of Us
PSP - Daxter

SNES - Chrono Trigger
Game Boy Color - Pokémon Yellow
DS - DIgimon World Dawn

Ask me tomorrow, and my answers will probably change. And of course, those are the system I own/owned, not what I played.

Genesis - Sonic and Knuckles

Playstation - Resident Evil 2

Playstation 2 - Resident Evil 4

Wii - Metroid Prime 3

Xbox 360 - Bioshock Infinite

Playstation 3 - The Last of Us

Playstation 4 - Killzone Shadow Fall

Gameboy Advance - Yoshi's Island

DS - Castlevania Portrait of Ruin

3DS - Pokemon Y

PSP - Kingdom Hearts Birth by Sleep

Vita - Little Big Planet