Gruff but lovable...

... and self-aware, Larry Summers:

"I said to the president when he asked me to do the job that I was a person who had strong views, and that I would make every effort to make sure that he was exposed to all perspectives and that each of those perspectives would be presented in as effective a way as possible. But if he wanted to maximize the feeling of kumbaya in the group, I wasn’t the right person."