SuSE Linux (a German distribution), some niche, single CD distrubution, Debian for a while and, finally, since ~2006, Gentoo on my servers and since ~2015 Gentoo as my desktop.
Debian and its derivatives never felt right for me. I find too many drawbacks with binary packages (non-configurable build options, therefore dependencies that can’t be disabled, relying on humans to keep ABI compatiblity, trouble integrating my own packages or unstable versions) and I just don’t like systemd.
It’s weird, I’ve seen more than enough of those “Install Gentoo” memes, but I find it the most pleasant system to run in the long term.
If you were alive (and online) during the 90s, you may remember the banter between Microsoft and General Motors:
From https://crysa.fzu.cz/ondra/documents/cars_like_windows.html (the only online copy I could find)
30 years later, some of those jokes are finally becoming reality, thanks to Tesla.