All weapons are fun when they’re overpowered, but I think the fists might be the best of all. I’m running through some older missions to unlock NG+3 and it’s a never-ending display of light and sound. There’s a mystic art that reduces ki consumption for repeated strike attacks, so you almost never stop attacking.
In the same way, most weapons have some sort of ki-dump chain attack to shred enemies that can’t fight back for a few seconds. The fists version of this is my favorite: it pairs well with that ki-preserving mystic art, it has a small bit of forward movement to help you stay connected to the enemy, and there’s a fun acceleration to the attack that makes it extra satisfying to land for a long period of time.