I'm only rude when I realy have to get the shot and people are in the way. Usually that would mean being rude to your colleauges and other shooters. But nah I try and be as nice as possible all the time. Sure you might elbow someone but then you say you are sorry.
Alot of amateurs do have huge egos and produce ****. Alot of pros have huge egos and produce good stuff. I like neither. It's personality I suppose.