Around 50+ hours per week.
For all those that said they play
BF2, If you haven't already done so... Do yourselves a favor and check out "Project reality". It's probably the best BF2 mod ever created. If you like life like war simulation, then P.R is for you. There are many Armed Forces players that play. They play the game as if it was real combat. It's pretty intense. For awhile I was playing with a group of guys from the US Marines.
I was lucky enough to get into their squad and learn from them. It's the realist thing you'll get to being on the battlefield getting your butt blown off. The whole idea behind P.R is realistic combat and SQUAD LEADING.
Project Reality : Battlefield 2 Mod