I've been playing WoW pretty much since it was released, but it's been an on/off relationship. I can play for a few months, maybe more if there's new content or I'm levelling a new character, and then I'll take a break for a few months or half a year. I have a level 80 priest, rogue, warrior and mage, in addition to a level 60-ish warlock, the mage being my definite favourite.
I'm obsessive about all my gaming, but I don't find WoW to be more so than other games I like. There's just more stuff to do, and a social aspect, so it naturally takes up more of my time. I don't have a guild anymore, which is sad, and no friends playing on my server, so all this new GearScore and Achievement-requirements for raids annoys me, as I am first and foremost a PvE player.
Anyway, if you can enjoy it without going overboard, it's a great game, and I wish you the best of luck.
I play on Dentarg, EU, and I play Horde.