ATC View
Well for what its worth since you posed the question!
PPLs/GA Flights- Calling our controlled airspace a MATZ, When I am working other freqs I say standby they still babble on or even worse raise their tone to get a reply again and calling 2 miles from CAS boundary expecting a clearance(early call works 99% of the time).
Professional- Sometimes I wonder if they think they are the only plane in the sky wanting priority.
I am a PPL holder so am tolerant of most things though! honest!