The only thing that I have gotten her to really try was "Zoo Tycoon" and she kind of enjoy's "The Sims".
For me, I've tried WOW... and just couldn't get into it. I put tons of hours into my character, and was still at a very low level. It didn't help that nobody in the game would help give directions or advice. I got tired of that and went to "Dungeon Siege 2"