It's only bad for you if you let it be, I think. Personally, I like playing, but I'm not about to lose sleep, or take off work just to play. It's mostly casual for me, though it is a lot more fun to do stuff with friends in there. Unless they're into the intense stuff like raiding or pvp. That's what usually gets people, cuz guilds will put those on a schedule and make it mandatory to show up. That's a no-no for me :<