My key measurement of a documentary's quality is whether or not it is trying to sell something. I believe the film makers did a good job of not promoting Bryan's quest. Instead, it was more informative about a very unique, if not odd lifestyle. This got it to a five, but ultimately it was just too creepy for me to give it any more.
Bryan has quite a few hang ups, and this seemed to be the focus of the second half of the film. I'm glad he has found a way to cope with his depression, loneliness, and lack of interpersonal skills - especially since he only has a few hundred million in the bank.
Ultimately, I found him creepy, narcissistic, and (ironically) very unhealthy looking! He kinda reminds me of the movie character "Powder".
Notice how often he appears shirtless.
Total sideshow attraction.