not many america's army servers where i am so i play mohaa breakthrough or rtcw is extremely popular for some reason here in new zealand so i play that occaisionally
Used to be more popular but Call of Duty and MOH-type games have seemed to attract a lot of the better players away.
On a related note, someone asked what to do about stress... that was my answer - play online games (or other single-player games like GTA Vice City - gotta love Vice City!!!).
My wife thinks I'm nuts to be on the computer after 8+ hours at work on the computer - I tell her it's MY TIME and I'm stealing back some brain cells...