If I ever decided to leave it would be because of the lack of inactivity on here. About 98% of the time I get on here to chat with people, and since all my close friends on here I had found outside of this forum, I don't think it would be a bad thing for me to leave.
I'm not planning on leaving anytime soon, though. If we start having outrages again like we did back in October-November then I might take a break for a while.