I don’t even remember all of them, let alone the correct sequence. I’ve also had multiple computers at one time (still do), and usually they have different distributions (still true).
First experiment: Mandrake
First serious use: Ubuntu edgy eft or something
Spiraling out of control: kubuntu, xubuntu, lubuntu, debian, kaos, mint, easypeasy, fedora, korora, rox, manjaro, openmediavault, rockstor, + many niche distributions
Current: arch and debian
Before you ask, no, I’m not a diagnosed psychopath.
I’ve never had gentoo before, but what I’ve heard from other people might explain that part of your journey. You went from unstable to stable to Arch, which says something.