What makes it your favorite? Do you want to play it? If so, what's keeping you from doing it?
For me, it's Burning Wheel.
I bought it purely based on aesthetics back in 2008ish, then got the supplements, then Gold, then Gold Revised, with the Codex, and the anthology...
I blame it for my weakness for chunky, digest-sized, hardcover RPGs. :P I also like the graphic design, I like the prose (even if it's divisive), and it has both interesting lessons you can plug into other games (like "let it ride," letting success or failure stand instead of making lots of little rolls) and arcane systems that pique my interest (like the Artha cycle, which makes roleplay, metacurrency, skill rolls, and advancement all intersect). I genuinely like reading it for its own sake.
I haven't played it because... well, since it's not D&D, that immediately makes it harder to get people interested, sadly. It's also a bit daunting, given its reputation as a crunchy system. But I have a group of players interested in trying new things, and fewer other games calling for my attention, so hopefully I'll get a chance soon. :)
I'm on EndeavourOS, which like CachyOS, is a derivative based on Arch. They smooth over a couple of the things that make Arch difficult: the installation, and initial packages.
Part of what makes Arch difficult is that it updates its repositories very quickly. That's good in many ways, because you get new features and new drivers more quickly, but sometimes things are buggy or break. From what I've heard, it's honesty fairly rare nowadays, but it's still a best practice to check archlinux.org before proceeding with a major update.
Anyway, I'm in a very similar boat. I've bounced off of Linux for various reasons in the past, but between Linux getting better and Windows getting worse, Linux is the "just works" option for me. It's not perfect, but any snags I've had have been smaller, less frequent, and more often fixable.