I am also a caretaker (not on SO but in the communities I join) and therefore I think I can say that caretakers are not really the best of the four. We often overdo things, get too much involved, too much heated up, which doesn't decrease the stress and doesn't create a healthy atmosphere at all.

Also there are two more groups Mystikal doesn't see in his ambitions. One is the group of people who come from time to time to ask or answer some questions, moderate a little, just have fun and learn something. And there are also the people who actually work (I mean for money) to keep the community going. These people often are just interested to calm everything down. I think these two groups should not be underestimated because often they are the reason it didn't break completely. They don't need to voice their opinion to every single post, so they are not as visible. But they also don't have beef with anybody and they provide actual content most of the time, because that's the only reason they came in the first place.