Stable? Good? Bad? Annoying? Is it beginner friendly? Should I try KDE or Gnome?

I’ve only used Mint and SteamOS and from what I understand KDE should be similar to SteamOS Desktop mode because that is KDE based, right?

I don’t plan to distro hop any time soon, but I’m just curious if I ever get a new laptop I might try it to take advantage of it supposedly being descent at performance optimisation