I'm against modern FPS. Modern combat makes for terrible gameplay, which means game makers have come up with a ton of really stupid mechanics to keep people interested, which completely negates all the important aspects of modern combat. CS probably got it closest to correct, but I just found it boring. I like my combat to have meat to it. If I get completely destructed by an opponent in a 1v1 duel, it should probably take 15-25 seconds to resolve. It's like everyone playing Rogues back in the days of stunlocks. Blah, no thanks.
Note this is just FPSs, and mainly those with "modern" mechanics. I'm ok with Tribes, that has a good enough combat feel to be fun. TF2 though is too lethal. I also don't like the map layout memorization of games with 3D environments.