My 360. Not because it didnt kick ass, but because I found I didnt have enough time to play it because I have so many PS3 games. Good thing is I sold it for a profit, so it wasnt a total loss.
I guess Mirror's Edge is a close second. I could have rented it and got the same enjoyment. I loved the experience, but it was far too short.
I am a gamer. Not a fanboy, not a troll, a gamer. So when you dont like what I have to say, remember this fact.