rather than rattle off shooters that are already out and that you probably would have played if you were at all interested in them, ill just post a few videos of upcoming shooters you would probably enjoy. btw, these are games that i am extremely excited about. i wouldnt show them to you if i didnt want them, myself.
Battlefield 3 (October 25)
DICE has shown that they are the kings of multiplayer, and since Battlefield 3 is their most ambitious project yet, i think its safe to say that it will offer one of the greatest competitive multiplayer experiences of all time.
RAGE (October 4)
if you can appreciate story and a long, exciting campaign in an FPS, you should get RAGE. think of Fallout 3 and Borderlands combined and perfected, and you get RAGE. it is, of course, open-world.
Prey 2 (2012)
no need to play the first Prey from 2006 (although i have heard it is a great game) because this one basically has nothing to do with the original... even so, it looks AMAZING. again, this game is supposed to offer a rich single player experience. no multiplayer, but i think it will offer plenty of replayability. Prey 2 is also open-world, and in just the kind of environment ive been hoping to see in a game.
those are my top three FPS that im excited about, but heres a few more games im looking forward to...
Deus Ex: Human Revolution (Auguest 23) - http://www.youtube.com/watch?v=x-2JzHJSgdc
Dead Island (September 6) - http://www.youtube.com/watch?v=hHDn3p879rw
The Darkness 2 (October 4) - http://www.youtube.com/watch?v=xSgiwehOt7w
Bioshock: Infinite (2012) - http://www.youtube.com/watch?v=n6_PSJJFqmk
Far Cry 3 (2012) - http://www.youtube.com/watch?v=iaGSSrp49uc
who says the FPS genre has no originality? pfff... if you dont get turned on by at least half of these games, you shouldnt be allowed to even have an opinion about first-person shooters
personally, i will very likely be getting every one of them. im still sort of iffy on Dead Island and The Darkness 2, because i havent seen quite enough footage of them yet for me to be sure about buying them.
Edit: and in case you are curious, every game i listed is for PC, Xbox 360, PS3... so just pick your favorite