Mark Pilgrim writes about how most developers are morons or assholes in a post about why specs matter.
Most developers are morons, and the rest are assholes. I have at various times counted myself in both groups, so I can say this with the utmost confidence. [dive into mark] [via The Universal Church Of Cosmic Uncertainty]
I believe this applies to sysadmins also, but there are probably one or two more groupings. I know I've fallen into both camps at one time or another. Though I tend to think that my time in the asshole camp was usually caused by dealing with a moron.