I also quit a few months ago. I didnt want to make a big deal out of it so I never posted anything here.
The reason I left was not a hatred of the game or anything, it was mostly a hatred of the grind and time commitment. I was liking Cataclysm for the most part, and the challenges in Heroics were pretty damn hard, but do-able. However, all of this was a considerable time-sink, and as I'm getting older, I just cant dedicate this much time to an MMO anymore. I have a wife, 3 kids, and a huge library of games, movies and TV that I have not been able to get to because of my MMO "addiction".
I thoroughly enjoyed my WoW experience overall, and I'm not ruling out a return some day, WAAAAY down the road. But I'm definitely done for a good long while. And I'm guessing that once The Old Republic comes out, WoW will be nothing but an afterthought for me.
Cheers!
Connect With Us