Just got my BJJ blue belt from Rick Sparks (Soneca black belt.) It has definitely been the biggest physical fitness/martial art/self-defense accomplishment for me.
I started around 290#, mostly fat, dropped to 240, but have gained much muscle (supplemented my training with stronglifts) and I feel amazing.
Thanks for letting me boast. I think my story could inspire many, but it may be TL, DR.
I never dreamed some of the things I would be able to do with my body, that are now done without hesitation or much thought.
Whatever martial art, physical training you want to do, don't wait. Do it now, keep doing something/anything to keep you active and headed towards peak physical fitness.
Lots of good systems out there, but this is the only one that kept me coming back when all it did was hurt.
stronglifts stats: 255 lb squat (15 over body weight), 120 OH, 140 bench, 230 DL, although I really only care about my squat progress :)