I play world of Warcraft; I'm 20 years old.
I work part-time.
I live with my fiance
I go to school full time for Network Administration
I can moderate myself in the times I play, but sometimes I do loose track of time, but i would not consider myself addicted by any matter. anything is addictive beyond a point of excessive use, just most people are afraid to admit it.
WoW is hard to grasp at first, but beomes easier with time as anything.
If you have the spare money to invest do it, but only if your financial status is stable.
I mean with 11 million subscribers, they must be doing something right, plus the people saying they dont like it, either suck at the game, or play the game, and are addicted and dont want to admit it

Playing wow in excess if like playing any other console, or pc game alike in excess, no different.
I play a 70 Warlock on Stormreaver.
Good luck.