One thing i hate the most -- Excuses.
The reason for schooling is to gain knowledge and to exercise your faculties, to be the better person you parents wanted you to be, the citizen your society can depend on, the man responsible for his every deed & action he commits. But to some of the person I know, education is like purchasing a rainbow coat during summer, they can have it whenever they wanted to with the mere fact that they do it not for the benefit of themselves but only to have-it-due-to-momentariness. I hate them ! I hate them a lot.