Right, but in the long run, a really obnoxious guy who is right about the market more than everyone else could probably end up running money, using other people as buffers. A small hedge fund really doesn't have a lot of overhead, so one obnoxious genius could work with 2-3 other people.

There are lots of roles in finance where connections and likability are probably primary (once you pass a certain level of competence), though.