PS3: At the time for Heavenly Sword, Resistance and Uncharted. Was more for the promise of MGS4, Killzone 2, Heavy Rain, GT5 and FFXIII though.
Wii: Wii Sports and Zelda
360: Was a present so it doesn't really work, but mainly for Gears of War and Halo Wars (bit of an Ensemble fan).
PSP: Crisis Core
PC: I always buy/have a PC but this gen: Oblivion, Fallout 3, Crysis, Half-Life 2 Episodes, Portal, AoE3, Mount and Blade, The Witcher, Neverwinter Nights 2, Dragon Age: Origins, Mass Effect 1 & 2, CoD4, numerous mods and for the promise of Starcraft 2 and Deus Ex 3.