First person shooter - Bioshock
Third person shooter - Gears of War
Platformer - Super Mario Galaxy
RPG - Elder Scrolls IV Oblivion
Fighter - Soul Calibur IV
Action/adventure - Heavenly Sword
Racer - Mario Kart Wii
Stealth - Metal Gear Solid 4
Overall:
1 - Elder Scrolls IV
2 - Gears of War
3 - Super Mario Galaxy
FFXIII, Killzone 2 and RE5 most likely are going to take over the list.