What distro are you running on your desktop and why?

Fedora 30. Why? Familiarity - I've been using RH derived distros since about 1997 or so. And I've experimented with others, while so far none have shown me any particular reason to switch.

Mint MATE.

Fast, stable, Spartan (more less a clone of Gnome 2). Included are proprietary codecs and drivers, so you don't have to go off and hunt for them.

Linux Mint Cinnamon on my 10 years Lenovo laptop. It works fine out of the box, while Windows sucks.