Mostly the curtness and clear disdain/disrespect for most of his allies. I mean, okay, it's Fortress and a certain amount of that player-wise is natural if you're decent, but I hate to see it come across that much in a character that it doesn't seem to fit.

I don't claim to speak for everyone there; it's just something that I personally would not have fun dealing with as a Fortress character. I'd rather go do something else.