WoW eats your soul, man. I've lost innumerable friends to WoW, and I'm serious contemplating joining an Anti-WoW group because it's become unberable. Every time I am able to coax my friends out of their rooms, all they talk about is their characters. It pisses me off.
If you have that little self-control I think you should stay away from such addictive games. ;>
I myself play WoW every day and it's not for nothing it's the biggest MMORPG in the world. Though I'm warning you, if you're a weak minded person, you'll easily get stuck in the game, and it could have consequences on your real life. It's a great game after all.