Ubuntu MATE 18.04 is pretty nice so far. Support for 3 years on this one. Just released yesterday. Nice retro functional desktop and comes with some useful bundled software.
I've been using KDE Neon off an on in a VM at home and I think on Monday I'm going to replace my Windows 10 PC with a KDE Neon PC as my primary work computer. It'll be physically a new PC because I have to keep the Windows PC for certain applications and tasks that require it for my job.
But for the bulk of my work I don't need any particular OS.
KDE Neon is pretty well done on the GUI look and feel and with a lot of customization options. Here are a couple of good review videos.
Cool thing about it is that its highly customizable to taste. I guess you can have a crossover between KDE and Gnome DE's for some apps.I'm not big on it's current default looks, but the setup in the 1st video (I didn't watch the second) was rather nice.
I've played with Linux over the years now and then but never really used it for anything. I'm not a programmer type of person and having to compile things is a PITA to me. I once tried Gentoo and found that it was way over my head!Ha Ha... Yeah, I have most of those and several more. I've been a Linux user for MANY years. Much longer than I've been a Mac user. The last MS OS that I enjoyed using was DOS. I hated Win from the start, from there I went to OS/2 when it came out. I stayed with OS/2 until the end and moved to Linux. It was difficult to learn in those days. You had to compile everything by hand. It's almost as easy as any graphical environment around now days though. It still doesn't have the support and polish of macOS or Win, but it's bringing up the rear nicely.
I still prefer macOS over all others, but I still like to tinker and play with all of them.