He's not really a prick... But he is exactly what I'd do if I was given a cheat ability: Fuck with everything as much as physically possible. Morals be damned, if I have a charisma stat high enough that people will let me get away with shit like this and be fine with it, I'm doing it day in and day out.
EDIT: And also, at least, like most slave owning protagonists, he isn't a major dick about it.