JJ and BJJ and TKD are very valid art forms. I have to say though I have friends that are huge BJJ fanatics, and they always say the same thing 99% of every fight ends up on the ground, but I say not in a street fight. In a street fight you'd better try your hardest not to go to the ground, because sometimes their buddies might kick you in the head while your busy trying an arm bar on someone. If you are fighting an average Joe and he is alone, go for it. Hopefully he is an average Joe. If your at a club or a party and there are a lot of people around, you'd better learn how to fight on your feet. Always be cautious and aware of your surrendings and over confidence is a weakness.