I still play it. I can see how an addiction could piss somebody off though. I kind of was addicted for about two months immediately following the release of WOTLK, but I started reducing my time on to about 4 hours a day for maybe 4 days a week, and this is pretty much all of the gaming I do these days.
I think the only reason I still play this game is because the FPS games have really started to suck over the last 5 years, and I almost never play them anymore (TF2 is about the only fun FPS right now.) That and after you advance your character so far, you tend to really get into the game even if you don't play it much (seriously I've built a character
that I think people would really pay some bucks for if I was interested in selling.)