No, it was being called at the last minute ("Can you get here in half an hour?), rushing to class so fast that my freshly washed hair froze in the cold, then arriving to discover my first class was not for two hours. Teachers who not only leave no instructions but no roll books. Being called to teach PE without anyone knowing if I needed to dress for outdoor field hockey or the dance class. Being called at the last minute to cover for a teacher who requested a sub two weeks earlier. Telling the person who calls that I cannot teach after 1:00, being assured all pertinent classes are morning classes, then arriving to discover there are two afternoon classes. Agreeing to teach biological science and arriving to discover I'm there for French, a language I can't even cuss in, let alone actually speak. A couple of teachers in the breakroom who make sure I overheard them talking about how subs are just "babysitters with no qualifications."
It wasn't the kids. Kids are kids. It was the damned administration.
Did I mention the state's second largest school district paid their subs the least daily wage by a wide margin?
I did love teaching lower grade school PE, though. Everyone else seemed to hate it, so I got called for that a lot. I also covered for the HS art teacher at least once or twice a month during the fall and winter. That was fun. The first time I subbed art, one of my dance students was the teacher next door. She came through the connecting door, introduced me, announced she did not expect ANY PROBLEMS, and departed, leaving the poor students wide-eyed. There were no problems.