Generally speaking, the really deep logic people (programmers, systems/netowrk engineers, database folks) will skew towards a bit of gruff arrogance. Anything that takes a high skill level and years of training.

The other people like the PC repair folks and web designers tend to be just plain dicks. They have an opinion or alternate view on EVERYTHING. The payroll guy here loudly talks like he's some super nerd, meanwhile the people doing heavy work barely talk all day.


Basically, the less skill it take for the job, the more arrogant and annoying they seem to act (imposter syndrome, maybe?)