These comments made me laugh. I taught aerobics for 10 years and things inside the gym haven't changed much! I DID get burned out on teaching aerobics and was quite happy to be a consumer of the services. A couple of years after that, I started cycling outdoors.
I have thought about teaching spin, but I know that the pressure of "performing" could get to me. And the clients do "talk" some nasty gossip about instructors. I am not afraid of being in front of the class (I taught kids for 30 years), but you all are correct in stating that there are 2 types of people who teach spin... outdoor cyclists and aerobic instructors. I find the groupie aerobic people tend to like the aerobic instructors who do all the stuff I consider to be contraindicated, like super high cadence while doing a standing run on the bike. The outdoor cyclist instructors seem to be able to meet the needs of a wider range of clients. Well, I am still riding outdoors and I guess I will be deciding about getting certified soon.