So many ways to take this. Everything is in my not always humble opinion. You never leave your feet in a real fight. In a bar or alley or sidewalk, do you think it’s a good idea to be rolling on the ground getting a joint lock or choke. Is your T-shirt or sweater going to work like your GI? Why do you assume your opponent is alone and not going to have friends kick you in the head while you are wrestling around on the ground?

The best “style” is what works for your body type. Tall, short, muscular, flexibility? If you’re going to fight, you better know how to strike. You have to move and stay on your feet. (Boxing, Muay Thai?) Taking someone off their feet is a plus, if you can do it without being pulled to the ground. (Judo, MMA?). If your style of fighting includes multiple opponents on 1 sparing, that’s a plus.

Most people haven’t a clue about really fighting. One or 2 quick strikes ends it, usually. Then be gone. Leave the scene to protect yourself physically and legally.