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.
Mine was back in 1999 courtesy of this:
https://ia800600.us.archive.org/35/items/TheLinuxPocketbook/TheLinuxPocketbookfrontCover.jpg
The Linux Pocketbook from APCMag, which included a full copy of Red Hat 5.2 (according to this image, I vaguely recall the copy I had had a slightly different cover so they might have updated it). Having it on CD was a big deal back when we still had dial up! I remember how daunting the command line was at that point - like I had grown up on DOS and then Win 3.11, but a full blown Unix system was not something I was used to at that point.
For some extra context, my PC at that stage was a Packard Bell desktop 😅