I use MXLinux, picked it somewhat at random when I was frustrated with windows 10 privacy settings and haven’t looked back since. I tried mint, mint cinnamon, Ubuntu, and Fedora before MX, and Fedora is the only other one I have stuck with, to use on a Surface Pro (I needed Wayland for the touchscreen).
MX has been really stable, light on resources, and has worked really well through two complete hardware upgrades. I play games on steam, some brand new some old, and I haven’t found one that I can’t play yet. That is due to steam/proton/proton GE more than the OS I expect but I’m happy nonetheless. I also run my home entertainment box on MX on an old PC (I know there are better choices for os for this, I was just comfortable with it).
I like it because I haven’t felt any reason to try anything else, perhaps someday I will and I’ll just find a new OS then, but until then it’s my favorite I think.