Most practical martial art?

IDK, it seems I had a very different Tae Kwon Do experience than most people. It's possible my instructor slightly altered how he taught Tae Kwon Do, since he taught I believe 3 other styles. Anyway it always seemed to be fairly practical, if you were going one on one. Versus more than one person, you'd be in a spot of trouble. I did have to fight 2 people at once during my black belt test, and it wasn't easy. It basically involves rotating around so that you always just have to fight one of them at a time. Good tactics I guess, but that isn't exactly practical in all situations. That's really the only flaw I saw in Tae Kwon Do. Can't be (easily) adapted for fighting more than one foe.

Jam it back in, in the dark.

Tae Kwon Do has some surprisingly good defense techniques, or at least the way I was taught it. From what I've heard of it, I'd expect to learn far more offensive moves. I guess though they do teach you to block in ways that injure the other guy, hopefully. It was fairly balanced though, with just a few shortcomings. It's a terrible technique to use versus more than one foe, because there aren't really any guaranteed incapacitating moves, you just have to hope you hit/kick hard enough in the right spots to take down one guy each time you attack.

It's fun, and excellent for exercise, and for the most part practical. There are better forms for combat, I won't argue that, but I was definitely satisfied with what I learned. I got to 1st degree/3rd level black before I stopped.

There's nowhere I can't reach.