Mint cuz I’m a newbie and it was recommended.
I tried KDE Neon Plasma a while too and it was doing a weird stuttery jitter thing with the mouse that I didn’t like so I switched back.
Mint just hasn’t had any huge frustrating problems or anything wrong with it that I couldn’t fix in the settings menu. Just how I like it.
If a computer is a car, then Linux(the Kernal) is the chassis. Mint (the distro) is the motor, and Cinnamon (the desktop environment) is the fancy interior.
KDE plasma is a fancy interior that works with tons of different motors.
Cinnamon is designed for mint and works best with it.
DISCLAIMER: All of this is analogy and isn’t technically correct in a pedantic sense, but it works well enough for me. I’m sorry if my analogy isn’t exactly accurate.