Early Mandriva with KDE 3.4 or 3.5 I think, but I can barely remember anything with clarity. It couldn’t have been bad though, since I haven’t used Windows on my own devices since 😉.
From my foggy memory, I think it was good for my then nocoder self, easy to use, stable, relatively lite, and had good looks.
I missed the Mandrake and pre-Fedora Red Hat era, but not by much.
Forgot to mention that I wasn’t exactly young at the time. We just didn’t have reliable broadband internet back then in my neck of the woods. So I had to download ISOs and save them in a USB thumb drive in a uni computer lab.