EndeavourOS on my desktop, Arch Linux on my laptop.
Free and Open Source Software
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Currently I run GNU Guix on my desktop, laptop, and servers. I like the dedication to software freedom and the way package management works. Before that I used Debian until 2019, Trisquel until 2014, and Ubuntu until around 2010. Debian and Trisquel are fine and I don't have anything against them, I just like the Guix package manager more. I've used Xfce with all of these (and before then, GNOME 2). I set it up the way I like it and it never changes.
I typically run LineageOS on my mobile devices, without microG or any proprietary apps. As I've said before my preferred OS would be some variant of GNU/Linux, preferably Guix as well, but LineageOS works well enough.
I run OpenWRT on my router, and had a previous router than ran LibreCMC (a variant of OpenWRT using Linux-libre).
Windows games are made for Windows so I prefer to use Windows for them. I don't particularly want to turn GNU/Linux into Windows, I think it deserves better than that.
EndeavourOS on my desktop and laptop. Works like a charm. By far the happiest I've been with a desktop distro.
On my server VMs I'm running Ubuntu Pro because it's absolutely impeccably stable, Pro is free and I like the idea of having the option of not upgrading them for 10 years.
All running on Proxmox. I have a few appliance type VMs like opnsense and 3CX and they're nice and stable too.
Q4OS, it's Debian based with KDE, it's beginner friendly. It even has a Windows installer for easy dual boot