Could you outline some of your failings?

At a lecture given by a world-renowned and very high-brow artist, a friend asked in the Q&A afterwards "It's been great hearing about your work, could you outline some of your failings." The guy was floored. But his answer gave more insight into his work than 3 hours of talks about his great work ever could. Failure is far more interesting than success. And far more important too. A corrective to the spun-sugar culture that inflates importance.