PS3 with wii a close second:
FPS: PS3/360 (Resistance 1+2, Killzone 2/Halo 3, Bioshock)
TPS:PS3 (Socom, MGS4)
RPG: 360/PS3 (Tales, IU, Fable 2, Star Ocean/FF 13, FF vs. 13, White Knight Chornicles, Disgaea 3
Adventure:Wii (Zelda)
Strategy: Wii/PS3 (Fire Emblem/Disgaea 3, Pixeljunk Monsters OH YEAH!)
Platform: PS3/Wii (Littlebigplanet/Galaxy)
Racing: PS3 (Motorstorm 1+PR, Gran Turismo Prologue+HD)
Feel free to add me as your friend-PSN ID: Bobo012893