ps3, i guess 8 months.
10 games
3 first party
7 third party

I've had my Xbox 360 since June of 2006 & have these games (11 games total, 1 was bundled, 1 bargain price)

Amped 3 (was bundled with my system for free along with a free controlle)

Battlefield 2: Modern Combat (at bargain price for $30)

Call of Duty 3

Call of Duty 4

 Gears of War

Halo 3 Legendary

Mass Effect

NHL 2K7

The Orange Box

Perfect Dark Zero

Tom Clancy's Rainbow Six Vegas 

I've also had a 20gig PS3 since launch with 1 game (NBA 2K7) that was bundled for free with the system. i haven't bought or rented a single game for it. 

2007 (Wii: 7 games / 4 months)

September: Wii Sports, Wii Play

October/November: The Legend of Zelda: Twighlight Princess, Resident Evil 4: Wii Edition, Trauma Center: Second Opinion

December: Super Mario Galaxy, Triiviial (Smarty Pants)

Interesting to see so many people who have consoles with very few games or in some cases no games whatsoever :-s I wasn't expecting that! Can I ask why anyone has bought a console but no games?

Wii - 5 months

13 games, WiiSports/WiiPlay bundles, Link's Crossbow Training bundle, 6 1st party, 7 3rd party, all bought full price.

1 VC game, 1st party

I've had a Wii for 6 months, I've got 19 disc games, no VC games, 11 3rd party, 8 1st party games.

7 used games (Trauma Center, Rayman, Super Paper Mario, Excite Truck, Warioware, Elebits and Zelda).

11 new games (TC: New Blood, Mario Galaxy, Geometry Wars, RE:4, RE:UC, Ghost Squad, Zack & Wiki, GH3, MP3, Wii Play, Mercury Meltdown)

1 Bundled (Wii Sports)

I should spend less money on games. :p

Wii: Bought two months ago.

Including Wii Sports and Wii Play, I have 5 Wii games, only one of which is a 3rd party game. I haven't bought any VC game yet since the Wii doesn't support Ad-hoc WiFi connections, and I don't have a router at my new place yet.

Xbox 360. Had it for 25 months. 24 games.

Halo 3
Gears Of War
Forza Motorsport 2
Call of Duty 4: Modern Warfare
Elder Scrolls IV: Oblivion
Call of Duty 2
Call of Duty 3
Guitar Hero II
Guitar Hero III: Legends of Rock
Dead Rising
Bioshock
Crackdown
Lost Planet: Extreme Condition
Perfect Dark Zero
Mass Effect
Madden NFL 06
Tony Hawk Project 8
Rock Band
Half-Life 2: The Orange Box
The Darkness
Tony Hawk American Wasteland
Quake 4
Naruto: Rise of a Ninja
Full Auto

Wii. Had it for 13 months. 9 games

Super Mario Galaxy
The Legend of Zelda: Twilight Princess
Mario Party 8
Wario Ware: Smooth Moves
Super Paper Mario
Resident Evil 4: Wii Edition
Metroid Prime 3: Corruption
Resident Evil: Umbrella Chronicles
Excite Truck

PS3. Had it for 12 months. 8 games

Motorstorm
Resistance: Fall of Man
Uncharted: Drakes Fortune
Heavenly Sword
Ratchet & Clank Future: Tools of Destruction
Warhawk
Spiderman: The Movie 3
Unreal Tournament III

PS3, 7 months
Resistance: Fall of Man
Ratchet & Clank Future: Tools of Destruction
Motorstorm (got for $54)
Warhawk
Heavenly Sword
Uncharted: Drakes Fortune
Call of Duty 4
Assassin's Creed

I have owned Wii for 12 months.

I have 14 games, 9 are third party. I bought all of them new.

Cars
LOZ:TP
Madden 07
Mario & Sonic
Mario Party 8
Rampage: Total Destruction
Super Mario Galaxy
Super Monkey Ball Banana Blitz
Super Paper Mario
Super Swing Golf
Tiger Woods 08
Trauma Center: New Blood
Wii Sports
Zack & Wiki

I have 6 VC games and all are first party.