Hi, Matt, welcome to SR!
My story sounds pretty similar to yours. I quit in December 2010, and while it seemed like a big sacrifice at the time, it turned out to be the best thing I ever did. My only regret now is that I didn't do it sooner... though mostly I'm just grateful that I quit, become it would have been so easy to let another five, 10, 15 years slip away.
Anyway, welcome to SR!