Not sure if this has been mentioned before, but I’m going to talk about martial arts.
As in, in my opinion, Taekwondo in the only really viable one.
Most martial arts other than Taekwondo rely on dodging and feinting, which can be bad at the start since, for one, it relies way too much of random chance while fighting for your life, and you have to stack points into dodge to make it viable where you wouldn’t normally have to put many points. You can then spend these spare points on unarmed skill and strength.
Not only this, but Taekwondo relies entirely on strength for blocking, as in your blocks hurt you less the more strength you have, and you can easily put tons of points into it at character gen. It also has a leg block and an arm, so you don’t come out of fights with tons of damage purely on your arms like you would if you used, say, Karate.
Taekwondo also has a move called “knock-back attack” which is unlocked at unarmed skill 4 which has a chance to stun your enemy as well as knocking them back 1 square, and is super useful as well as unlocked very early. There is also a move called “Sweep attack”, which does what it says on the tin. It is unlocked at unarmed skill 5 and is great for crowd control.
Another bonus is strength is not only useful for blocking, but is also used for many other useful things around the wasteland, like bashing doors, smashing windows, crowbarring things, etc.
Plus you feel like a badass B)