I'll admit to feeling some awkwardness in answering this question because it seems it is not in keeping with the spirit of the question but...

I quit my job yesterday. It was a source of extreme stress and was the most hostile work environment I ever had the displeasure of working in. I've had three heart attacks at work in the last year and the situation along with my health, continued to decline.

Well founded or not, I have almost pathological levels of responsibility and loyalty so quitting was very, very difficult for me but it was the nicest thing I've done for myself in recent memory.