and Ubuntu-based Linux Mint's cronjob that scared me when a bug that filled up one of my partition's related to a printing-daemon (THAT program already has notorious rep as printer manager), I will stay on Debian since it does BOTH of those/no-initial-postinstall-update-conflict-prevention through user-intervention.

Kubuntu

KDE Neon

Linuxmint

what else is there?

"When You Get Serious," Slackware.

For desktop, linux mint is still the best.

Opensuse for most of day to day work, centos 7 and 8 on personal VMs, AntiX on older hardware.

CentOS got dropped fast!

After two decades of using Red Hat products, I've finally abandoned them with the end of CentOS as we knew it. A year ago I put PCLinuxOS on my desktop, with a certain degree of apprehension over using a rolling-release distro. It's been great! In the last year only one upgrade went wrong, when a new python-pillow upset my card game — hardly a crisis, and it was fixed within 24 hours. Of course, there won't be many followers here, since we have no official representation and a very active and efficient forum of our own — complete with support in multiple languages.

As much as I love Slackware for desktop and server, in all good conscience I had to vote for Mint.

Mint Linux has been most successful at getting Windows users off of Windows and onto Linux. It makes the transition easy, and keeps them using Linux. Something about its user interface makes sense to Windows users, and makes them happy. People whose first Linux experience is Mint, stay Linux users.

That's not the be-all/end-all characteristic of desktop distributions, but Mint has made enough of a difference in enough people's lives -this year- that it deserves special recognition -this year-, IMO.

Voted AntiX. Gonna be installed on a Original chromebox where I did not offer much. But they accepted. Personally. I thought they would turn me down.

Paid basic pocket beagle board price <$25> . Came with everything. SSD is upgradable . As well as cpu. Up to I7.
Another semi-lotto <used> self learner project.

Another Slacker here, -current in my case.

PCLinuxOS

Difficult to answer, at work I stick to opensuse, on the laptop at home I moved to xubuntu because that was the latest endorsed at work for new machines, but I'm not fully convinced. It is true that it is easier to find precompiled binaries, but it might be heavier (but may depend on the old hardware) and sometimes the interaction with fvwm and the X server is strange. Also there are things I do not like, e.g. the choice of DNS is much more complicated that good old resolv.conf

OpenSuse without whistles and bells, Kubuntu is not on the list.
Slackware should be the best choice, but maybe on 2021 with the new one, if it comes out.