I met him a few years ago when he impromptu visited the gamedev studio where I worked (a mutual friend caught him on the street during lunch). During that brief visit he did come across to me as a really nice guy with a genuine interest in games and the tech that powers them.

He's a character. You should check out "Masters of Doom"

I guess losing your giant ego driven career after telling people to "suck it down" because "John Romero's about to make you his bitch" does that to a man.