I can juggle three balls kinda clumsy, but that's probably not what you're looking for. My brother used to be (still kinda is) a semi-professional juggler, so I do have some experience with that community. From my experience there doesn't seem to be a greater degree of rationality in the circus community, compared to other communities where people learn various skills.

What I did like from that community is the different learning style they have. Learning those skills is very hand-on and from being a total newcomer to being able to do something well enough to show off to friends and family doesn't take that long. (You can learn to juggle three objects or ride a unicycle in under a day.)