I’ll go first, I took my mom’s college textbooks which came with discs for a couple distros and failed to install RHEL before managing to get Fedora Core 4 working. The first desktop environment I used was KDE and despite trying out a few others over the years I always come back to plasma. Due to being like 12, I wanted to run my games on it, and man wine was not nearly as easy to use (or as good) as it is nowadays. So I switched back to windows until around 2015 or so when I spent the next few years trying to replace windows as much as I could. Once valve released proton, I switched fully and have t looked back, unless my still there windows partition tries to take over my computer when I restart it at least.
SuSE @ 1999, then Slackware in the same year.
Tried SuSE (bought as a box) as an alternative to the annoying, unstable and insecure Windows 9x, it was also the time when Linux as an alternative desktop OS was starting to get hyped in the media. Especially in regards to stability and security. Well, it wasn’t hard to beat Win9x in those areas. Tried it a bit, didn’t like it that much (I think it was KDE 1.x) and also didn’t understand much of it. I was still intrigued though and wanted to really learn it starting from the commandline, but I felt I couldn’t with all the SuSE stuff like YaST being preinstalled.
So I bought a big book (by Michael Kofler), it was the de facto standard book for really learning Linux from the ground up back then. And I chose a distribution which would be much more minimalistic (because I felt that makes it easier to learn). So I installed Slackware. I used it for like 3 years and learned a lot (all the basics), it was a hard journey though and other distros started appearing and they promised to be more modern or better than Slackware.
So I tried Debian next, then Crux, then Arch. This was all around 2002-2006. I can’t remember exactly how long I used each, but I do know I’ve used Slack for quite a lot, then Debian rather shortly, then Crux also not very long (basically I just wanted to test a source based distro but compile times were annoyingly long back in the day), and then it was Arch all the way. Arch was fast, rather simple, always up to date, and it had the great AUR. I didn’t ever look back.
I did take a break from Linux as my primary OS from approximately 2009 to 2017, mostly due to playing a ton of video games (Windows only, not runnable at all on Linux back then) and also due to my career path making me work with lots of Windows Servers, Powershell and other Microsoft stuff.
Since about 2017/2018 I’m back to Linux as primary OS (Arch, again) and haven’t looked back since. Even managed to fully delete all physical Windows partitions now (I only keep it in a VM in case I need to test something).
I’m testing NixOS on my notebook currently, it seems to be “the future”, but my main desktop will probably stay Arch for a bit longer still.
Looking back at using Slackware early on, I don’t regret it, since I learned a ton, but it was tough using Slackware around the 2000s. I still remember a lot of fighting with programs which wouldn’t compile due to dependency errors or other compilation errors. And a lot of Google searches for various compilation errors leading to rare and hard to understand solutions found in random forum posts. Compared to that, any Linux distro feels like mainstream these days. But it was an efficient way to learn.