My primary responsibility is to manage my staff. Most of my time is spent dealing with personnel drama. For my sanity, I tell new employees the one issue that will get you tossed off of my team is being mean. You would be surprised how many adults do not know how to be civil let alone, not mean. It always amazes me the lack of social skills that some adults simply do not possess.
The one thing they don't teach you in management class is that the only difference between work and high school are mortgages and car payments are in play.