BJJ has infiltrated my mind to a degree that I can't even comprehend...
the tactics and strategies that I absorb are universally applicable in life. concepts like making yourself invincible before mounting an attack, allowing an opponent to make a mistake and not interrupting them while they are doing so, sucking it up after a bad experience and learning from it and moving on, "riding" an overwhelming force rather than fighting against it, developing a healthy respect for both hard work and natural talent, recognizing the moment of truth when you should go for the kill, I could go on.
I can't tell you how many times I find myself in a real life situation that has nothing to do with fighting or grappling, and I think to myself "wait.. this is just like jiu-jitsu" I read Sun Tzu's Art of War years ago but I think now I'm actually starting to understand it.
its great for my health, its highly thereapeutic, and it teaches me about myself and the world. might sound silly, but its totally true
oh yeah, it's also given me a huge boost in fighting skills