I probably do 10-12 hours a week. Mostly Left 4 Dead at lunchtimes at work, and in the evenings every other day. A bit of ETQW and Q3 here and there. Does Brink count? :)
average week: 0-1 hours. when i get something i can sink my teeth into it jumps to 10-12 hours. last games for me in that vein were fallout 3, mass effect, lost odyssey, and bioshock.