1.

2.

3.

Number three varies depending on my mood.

Some honorable mentions to Bioshock, Metroid Prime 3: Corruption, Mass Effect 2, Super Street Fighter IV, New Super Mario Bros. Wii, Batman: Arkham Asylum and Red Dead Redemption.

1. Valkyria Chronicles
2. Witcher 1
3. Tactics Ogre

Phoenix Wright: ace attorney

New super mario bros Wii

Dragon Quest IX

1. God of War III
2. Alan Wake
3. Bioshock

-Metal Gear Solid 4
-Donkey Kong Country Returns
-Braid

Killzone 2
MGS4
Oblivion

Valkyria Chronicles
Fallout 3
Call of Duty 4

Probably those 3. Possibly swap Call of Duty 4 with maybe Metal Gear Solid 4 or Uncharted 2, depending on the mood I'm in.

My Top 10 of this gen so far :

1 - Donkey Kong Country Returns (Wii)
2 - Little King's Story (Wii)
3 - Dead Rising (X360)

4 - Super Mario Galaxy 2 (Wii)
5 - Silent Hill : Shattered Memories (Wii)
6 - Plants vs Zombies (XBLA)
7 - Henry Hatsworth in the Puzzling Adventure (DS)
8 - Excitebots : Trick Racing (Wii)
9 - House of the Dead : Overkill (Wii)
10 - Red Dead Redemption (X360)

Wii : 6 games
X360 : 2 games
XBLA : 1 game
DS : 1 game

1. The Legend of Zelda: Twilight Princess
2. Professor Layton and the Unwound Future
3. DK Country Returns

I left out some games though, Chrono Trigger DS and Phonix Wright: Ace Attorney: Trials and Tribulations, because I wasn't sure if they counted.

1.Mass Effect 2

2.Uncharted 2

3.Halo 3