Battlefield 1942 rocks, that's about all I can say. It's not your average corridor FPS. The battle's are massive, it's pretty accurate and the visuals are beautiful.
I'ev been playing the Desert Combat mod when I have a few minutes. It's all modern and it seems to "move" a little faster. Lots of fun...if you're playing BF1942, definitely check it out.
http://www.desertcombat.com