The only exclusive Playstation 3 title I'm really excited about is Resistance: Fall of Man, which is a truly fun shoot'em up set in an alternative version of the 1950s. Aliens have invaded earth; your job is to put bullets in them. While doing so you prowl through some gloriously detailed, beautifully gloomy factories and labs and shattered cityscapes. The audio is gorgeous, the weapons copious and diverse, the levels huge and complex. In short, it's my idea of a good time.
This reminds me: Super Contra for SNES is still the greatest game ever. I still play it.