Sons of Mandrake
PCLinuxOS is my favourite of the three I have tried. It seems to be more polished generally and with it using a modified APT and Synaptic, one of the best distros I have used when it comes to keeping my system up-to-date. Being a rolling release it can be a bit of a lottery when it comes to things breaking. That has happened but rarely and Texstar and his devs soon sort things out. The community is a good place to go when you need help and the forums are full of knowledgeable, friendly people. That said I have temporarily moved to Mageia as I was having severe problems with PCLOS. Things were not working and although I did manage to get some of then sorted out with the help of folk on the forum, in the end I jumped ship.
I first looked at Open Mandriva. Despite what they claim I don't think that OM is a direct descendant of Mandrake/Mandriva. Things have moved too far away from the original. The use of Calamares as the installation utility being the first thing that hits you. The use of SUDO is a personal hate of mine. I never know what password to use and to my way of thinking letting any user have root privileges is just asking for trouble. I just could not get on with this distro so I took a look at Mageia.
I tried Mageia in its very early days and although it was OK it had a few rough edges to it. These have long since been done away with and the distro is pleasant and easy to use. Its not as polished as PCLOS. A lot of things that need to be done after a fresh install are harder to do with Mageia, A case in point is the hassle I had switching from double to single mouse click. It took me two days to track down the toggle to change the setting. In PCLOS the option is there in the control centre. Software is another sticking point. RPMDrake is not as clear or as easy to use as APT or Synaptic and there are some gaps in the programs available. I had to side-load Palemoon as it is not in the Mageia repo.
So far I have been lucky and have not had any problems with systemd. From anecdotal evidence when something goes wrong you can be in real trouble. Fingers crossed on that one.
The Mandrake derivatives have inherited one thing that makes them stand out from all the other distros I have tried. The *drake suite of tools. Diskdrake is surely the easiest of all the partitioning utilities and I don't know why more distros don't use it. Hardrake, printerdrake and most of the others are, in my opinion, top notch and I miss them when they are not available.
My system admin days are long in the past now and my boxes are no longer my job or a hobby. I guess that I have reverted to a plain user with a few admin rights, so although any of these distros would suit someone like me wanting just a simple and easy to use computer there may be others who prefer a more hair-shirt approach.
Oh, in case anyone asks, I use the Mate desktop as I cannot get on with KDE or Gnome these days.