I honestly love my ps3. I mean with Demon's Souls, God of War, MAG, Socom, Heavy Rain, Uncharted, and I'm sure I'm forgetting other recent exclusive titles... their line up DESTROY'S anything new coming out exclusive for the 360.
With that being said, the 360 has a very large selection of quality games that are highly playable (no matter how much I hate some of them), There are gears of war, Halo.... someone else help me out cause I can't think of any other exclusives for the 360 right now. Anyway it does have a large selection of quality games, and most people find the 360 interface easier to use.