I have told this story before but...
When I was 'covering' the team for ES, at the end of the season, the PR Director came in and said 'we have a surprise for you as a thank you - we have lunch for you and all of the coaches ready downstairs'. I literally got to eat with Joe Gibbs and Gregg Williams right across the table from me. I tried hard not to fanboy but it was difficult. Gregg Williams is extremely personable and could not have been nicer. We were talking about how well he had been received in DC and he said 'It's the funniest thing... my teenage boy asked me the other day, hey Dad - how come everyone loves you here but in Buffalo you were just an asshole?'.
Joe Gibbs face turned red but he did laugh.
Anyway, I found I liked Gregg Williams a lot more than I would've expected. Not arrogant at all.