I just came across this neat infographic published on Mashable (and created by JESS3 and 24 Seven). The infographic is a year old, but it still contains some interesting insight into the world of a freelancer.
I definitely concur with a bunch of this. Wanted to control career path? Check. Wanted less stress? Check. I would add, as part of the "initial prompts to become a freelancer," the freedom to break out it in undeniably silly tapdance routines. You should try it. Loads of fun, and carthartic!