I have studied shotokan(3yrs), tkd(30yrs), hapkido(4yrs), judo(2 painful yrs) and bjj(8yrs). Tkd is my primary art and the others have been done, with different instructors, to compliment my training. The problem I am having lately is which sd to teach at my school? I was always taught by my instructors to use what works best. The self defense I learned from my tkd instructors was ok but did not work against a resisting partner. They would always say "of course, an attacker would not be expecting it" or "if they resist then strike them here first". My hapkido gm was amazing but many of the moves required complicated grabs and combinations that again did not always work against a resisting partner. Judo was great but very painful (falling again and again). I learned to off balance my partners when they resisted. Bjj filled many, many gaps. If you have never done it you should. Every technique works resisted or not. Timing, strategy and lots of mat time are the key. The down side is no striking and manyschools only focus on competitive bjj and forget the sd part. Took me 2 years to figure that out and find a good school.Back to my dilemma: Which sd to teach? Do I blend? Stay with pure tkd sd knowing it is inadequate?Hold special clinics on ground fighting/throwing(falling)/etc...?I know there are purists out there and I respect you/your opinion. I am not slamming tkd; I love it! But the truth is striking is a very small part of self defense. Attitude, awareness and adaptability are crucial when defending yourself.