>.> Addiction happens in many mmos, wow is just the leading cause of it since anyone can pick it up and get to the top with no problems. WoW is a great game and is definetly a time killer. Anyone that plays 1-3 hours is a socially stable person, 4-6 hours is a person that doesn't need a large social circle and can mind his or her own company, 7-10 is a person that has few friends and feels more comfy as an anon, and 11+ means that you have a gaming addiction to the game in question/has little to no RL friends/online friendships.
Now I'm not saying that this is just once or twice, I'm talking about daily use. If you play an mmo for 11+ hours... Then you have a gaming screen life. <.< Everyone can have their life however they want, but add some real social life than screen life.