I have done Korean Hapkido for about 23 years.....it is far more than self defense.
The flexibility, strength, coordination, and mind control gained is truly incredible.
I only go on average 2 or 3 times per week now, as I find it hard to get the time to attend.
But I also gained extreme self satisfaction as I got better, and earned my belts.
When I got black, my family and friends even came to see the presentation.
I was far more proud of that achievement, than i was graduating from high school and college.
It took many years, and a lot of sweat and hard work.....but if you do it the training can change your whole life.
I competitive race mountain bikes as well, and find that bike control comes easily due to all my years of martial arts....yes, it may sound crazy, but i really find it works in other areas like that as well.
Or not panicking when something goes wrong, as the mind to is taught discipline.
Cheers