I think Joint Operations is WAAY better than BHD, so scratch BHD imo.

Joint Operations is basically one huge battlefield, with up to 150 players. All flying, driving, sailing, running, swimming and diving around. A lot is going on it is pretty fast paced, however, as a sniper you can take the tempo down a bit. It is fun and I can recommend that. It is MUCH more fun to play with a squad or 1 or 2 friends.

America's Army is a great FPS, traditional, realistic and FREE. Download it here http://aaotracker.4players.de/portal.php