I am incredibly sick of the so-called-realism fad in fps games. I can't wait for it to go away, assuming it ever will. It deserves some space in the industry for sure, but there's no reason for 90% of the genre to be counter-terrorism themed or modeled after ____ war of the 20th century.
Quite. There's only one champion fit for that throne.
That aside, what bothers me more than the rapid deaths or pseudorealism in the Call of Battlefield sorts of FPS is the pure lack of thought. It's been reduced entirely to reflexes and willingness to camp like a bastard for every kill. That's a good part of why I've stuck with Counterstrike (and to a certain extent, Day of Defeat) for so long: There's a degree of careful planning and thought that makes a player good. You still need reflexes, certainly, but being able to predict and counteract enemy actions and positioning is key.
Incidentally, what I'd love to see? SS13 from a first-person perspective. Half the fun of things like TTT comes from the fact that you
don't know what you're going to see if you open a door, or if somebody is sneaking up on you while you try to hide a body. Though admittedly that's one of the smallest things that turns me off on SS13.