More games should be exclusive. It is what makes consoles unique. I would never want Mass Effect and Gears on the PS3, (because I have a 360).
They are different consoles, and it is sad to see so many 3rd party games being shared these days. I believe that only sport franchises should be multiplat.
Someone should create a law, where one game can only appear on one console. So every console has an entire library of exclusive games.
Wouldn't that be great?
(Note: I also have a PS3 and enjoy those EXCLUSIVE games as well)