Kinoite has my heart forever
Free and Open Source Software
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
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Arch KDE and SteamOS.
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.
I've been using Xubuntu for half a decade, zero regrets.
endeavourOS
Q4OS, it's Debian based with KDE, it's beginner friendly. It even has a Windows installer for easy dual boot