Springdale. Custom built Red Hat without the agro. Born before CentOS, excellent pedigree (Princeton University) and by using the net installer for 7.9, I can have a KDE4 desktop with everything lost when it 'upgraded' to Plasma 5. Plus it works every time I switch it on and doesn't break with updates.
Mostly Lubuntu, but I've got LMDE on bare metal as well. I've got a Fedora laptop that I just built out the other day. I've still got CentOS running servers and that needs to be dealt with. I also have VMs of tons of distros.
So, it's not a simple checkbox answer. It's a checkbox and a comment answer.