Really interesting, and congratulations.

Did you hire on any sort of "personality fit" at all? I.e. would you hire a technically brilliant asshole?

Personally, I really try to be objective, ask the same questions every time, etc.. but lately I realized that if you're going to be spending 40+ hours per week with a person, it's not just the matter of them getting their job done...you also need to be able to work together, and that does require some amount of congruency in personality styles