Basically I'm looking for a new hobby, and I have it narrowed down to 3:

A martial art, probably gonna do Muey Thai if I pick this.
Men's (duh) Gymnastics, most likely on parallel bars if I choose this
Breakdancing.

I just want to know if any of you toribashians know/do any of these and how difficult it can be to pick up and if you enjoy it or no.

I can't decide, a Martial Art seem like it would actually serve a purpose (self defense) in the real world; Gymnasts have ripped bodies, like holy fuck they're buff as all hell; and Breakdancing just looks sweet. They'll all get more fit which is my goal, I'm already fairly fit but I just want a new athletic hobby.

If anyone could provide any insight to these I'd appreciate it.