I quit my job today.
Well, not the whole thing. I'm still a freelance web developer. But I've spent seven months working with one client, and I realized that in that time, not once have they complimented my work. Last week I sent an email explaining that I'd made a change and their site was now 5-10 times faster. No response, just a complaint about a different small bug.
I realized, this evening, that I hated working. It was making me depressed, and sapping my energy for fun projects like BrothelS.im. So I quit, and now I feel energized and excited again. It's that simple.