Jiu-jitsu & lifting
I did karate from age five to twelve. It's the reason I can still be thrown around without panicking.
In college I started Brazilian jiu-jitsu and joined the club. Rolling is the closest thing I've found to debugging with your whole body — you're solving a problem that solves you back.
I'm between gyms at the moment and looking for one, so I've been lifting to kill time. 315 on the bench right now; four plates is the goal.