MOH is ok, the last one was pretty cheesy. I'm not big into the PC games, as my computer falls out laughing any time I attempt to install one. Most of the games I do have are for XBOX and PS2, and there aren't too many FPS military games out there for those systems. FPS became unpopular for a bit, but it is starting to make somewhat of a comeback for game systems.
I've seen a bit of the Blackhawk Down series, makes my blood boil and we've been working for awhile to shut that blood money maker down.
HALO, while more Sci-Fi military is actually a pretty good FPS, I taught my daughter to clear rooms on in.