Classic tormented comedian story, though I'm sure it had its unique twists. I remember back when he had his first major role as a villain, it was surprising at that point in his career yet he seemed oddly adept in the role.
My favorite quote from him (one of his roles): "I used to think that the worst thing in life was to end up all alone. It's not. The worst thing in life is ending up with people who make you feel all alone."