I just got a 360 for Christmas. Also got Dead Rising... that game is awesome
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Other 360 only games I want to play are Left 4 Dead, Mass Effect, Fable 2, and Gears / Gears 2. Of those, I'll probably only BUY Gears 2 and maybe one other FPS, just because all the guys at work have 360s and play together. The other games I can borrow lol.
I actually have the trifecta now... but I don't really play the Wii it is more for my wife.
The PS3 has some interesting games that are PS only as well - MLB 08: The Show is an outstanding baseball game, and there is Resistance/ R2 for FPS. I played Little Big Planet briefly and it seems fun, but there is no way I would buy it. My wife might find it more interesting but so far the only game she'll play on her own is MarioKart.
I actually prefer the PS controller, the Xbox one is clunky (although much less clunky that the original Xbox one).