People that are self centered and arrogant.
Example, we have a new rider on the commute van and as soon as he sits down he lays his seat back in the lap of the passenger behind him without asking. He also blasts the a/c without asking the other passengers if they want a temperature change. Lastly, he expects us to wait for him to arrive when it is convenient for him.
It must be nice to be the most important person wherever you are.
Rude!