One thing that bothers me is when players don't know the rules! Example, I played a guys and won the first set 6-1. So, we changed sides after the game/set. Then after the first game of the second set, I went to change sides. He got all upset, saying it wasn't fair and he should get a chance to play on the other side. I didn't have a rule book with me (never make that mistake again) and I couldn't get a ref over (I don't understand that). So I just gave in, not like it mattered.
So, take a little time and read or read again the rules and the Code.
I learn a little something everytime I do.