It really give plenty of incentives so you don't mind the repetitive aspect of it. I guess I haven't found the 'taste' yet because I didn't play it long enough. I just couldn't get hooked. Also I have not played in parties, I guess being alone with CPU versus on a team to plan attacks, explore caves, etc make a huge deal of difference.
I kind of would like to try it again in the future. Not soon, because of other savings, an overheating laptop, etc I don't think is the best time but people really seem to like it.
I remember one time at school a friend came with a petition where they were signing to ask the parents of one of his friend to cut him away from WoW because since he started playing he got obsessed and stopped caring for the school, notes went down and stuff. My friend got annoyed at me because I didn't accept to sign it. It seemed wrong. Anyway, that's my closest encounter about 'WoW destroying lives' I've had.