I was lucky(?) enough to have played enough RPG video games that had good stories and combat to be completely unimpressed with WoW when it came along. I got to level three or five or something, said to myself "Shit, this is boring." and never looked back.
That said, I put a ton of time into Guild Wars 2, so don't misinterpret this comment as me sneering at folks who did (or do) put a ton of time into WoW.