As a system, I do use my PS3 more, but it's mainly for movies. There isn't a good game on either console that isn't 10x better on the PC. But after thinking about it, I've decided that I actually like PS3 exclusives better than 360 exclusives. MGS4, Killzone 2, Killzone 3, and Infamous are masterpieces. Personally, I'm not a fan of Gears of War, and the Halo series are just average shooters with compelling stories. And, of course, the first Saints Row was a 360 exclusive -- which mainly tided me over until GTA4, but ultimately was the better game -- but has since been outdone by its sequels.
But I did like several of the launch titles for 360, including Perfect Dark Zero and Condemned, though the latter was later ported to the PC. Still, it was probably the scariest game I've ever played. It was like Doom 3 and a scary version of F.E.A.R. joined forces and found their way into a Se7en spin-off.
Speaking of F.E.A.R., why don't they make more of those games that don't involve Alma? I think they fucked the sequels up by focusing too much on Alma and little on other paranormal cases. I highly doubt that any government would fund such an organization for one case. I think the Alma story should've just ended in EPs/DLC.