Saw this and thought I would throw it out there. It's a short read. I always wondered why I felt like a sloth, now i know. It's WoW's fault!
http://videogames.yahoo.com/events/plugged-in/study-games-are-depressing-or-are-they-/1346074
http://videogames.yahoo.com/events/plugged-in/study-games-are-depressing-or-are-they-/1346074