He was not shy at all about saying whatever was on his mind. It was pretty awesome to hear him dunk on his VP, right in the middle of lying to the Rogers commission's face. He was also really open about the fact that nobody at Morton Thiokol trusted him for the better part of a decade after he did that. He said something to the effect of, "It definitely made my career harder, but on the bright side, I never had any major crises of conscience for lying about it.
He also didn't give a single fuck about getting a lunch beer at a student gathering. I wish I'd joined him in drinking beer at noon on a Tuesday on IEEE dime.