i don't know if it's something you might like, but Resident Evil 5 is coming up and i think that one is gonna be very cool. i'm not really sure if it's gonna be an exclusive but i think so. God of War 3 is another one that's not out yet. add kill zone 2 to the list. all three seem like they're gonna be awesome games. other than that, the good ones have been recommended. uncharted has a pretty cool solo player campaign, but once you have completed it i don't see how there's much replay value. heavenly sword should have a playable demo on the playstation store so if you make an ea account you should be able to try it out for free. it's a hack-and-slash game very similar to god of war and the likes. and the main character is a chick
isn't tekken exclusive to playstation as well? i think so. number six is just around the corner, with online play. it's not a shooter but maybe you like fighting games as well.
if you don't have a principal problem with registering your visa on your ea account and burning off $20-30, get PAiN and PixelJunk Monsters from the PSN store. although they are more uh, puzzle/fun games.
i made another thread where i myself as well as a few other posters put up some thoughts about a few games, you'll find more thoughts there. it should be right on the first page.