I've got a 360, PS3, and a PC
I use my PC to play RTS and FPS (minus HALO), and my consoles for sports, racing, and rpgs, as i can sit on my couch and play them comfortably.
I use my PS3 for Blu-Ray, and my PSone games, as any game worth playing, is available on the 360, and I'd rather do that.
360 gets most of my console time.