Personally I don't care about games being new and innovative. I want graphics that are as realistic as possible while scaling well across a variety of hardware, AI that's as immersive as possible, and FUN! I'd happily play another two dozen WWII shooters (especially Call Of Duty) as long as they are fun and have well-designed levels. I stopped playing GRAW when I realized that herding and preserving my braindead team members was more stress than fun, even though the game itself was an innovative shooter. The same with the Brothers in Arms series - I don't know WHY I even bought the second one, since I'd certainly had my fill of waving crosshairs and moving as though I were in a walker. (Note to developers: If my character is a soldier, then he or she should be a better shot and move faster than I.) To me, poor AI is much more of a fun killer than poor graphics or even poor level design.
That being said, I certainly prefer fun to realism; I really only want the illusion of realism, consistently maintained. Most combat soldiers go for long periods without killing anyone, and many are not certain if they've ever killed. Almost everyone who takes a single bullet is out of the battle. Preferably a developer can create the illusion of realism in a way that's fun, and when one has to be sacrificed, it should be realism.
That being said, I certainly prefer fun to realism; I really only want the illusion of realism, consistently maintained. Most combat soldiers go for long periods without killing anyone, and many are not certain if they've ever killed. Almost everyone who takes a single bullet is out of the battle. Preferably a developer can create the illusion of realism in a way that's fun, and when one has to be sacrificed, it should be realism.