Slackware 3.0 on a dual-boot Windows 3.1/Linux laptop running on a 486DX2/66 with a huge 510MB hard drive. I seem to remember it came on about six floppy disks and I was able to run Apache, X11 and Netscape in 8MB of RAM to develop wevb pages.
I wanted gentoo, just because the logo was so cool, failed to do it so I went with Fedora Core 4, that didn't fit me right so I went to suse10, and have been using as my main OS since(I also have 1 ubuntu computer)
Slackware 2 back in 1994. Oh man, so many floppies lol. Over 50 floppy disks. And every 2 months one would go corrupted
Around 1996 I found RedHat. Used it for 1 day, away it went. It sucked so much that I developed a deep, pure, strong hate for RedHat that lasts till today. You better kill me than put RedHat/Fedora on my disk
I kept Slackware until I discovered SuSE Linux 6 in 1998. That was it. Best Linux I came across. I kept it until 2008 even after Novell took over. I tried Debian along the way, but it sucked. I tried Ubuntu when the hype started and couldn't see why there was such hype; SUSE/openSUSE is way easier for the newbie. Ubuntu gives Linux a bad name I think.
Then, 3 months ago I discovered Gentoo I wonder why I didn't look at it sooner. I guess the reviews missed the point totally. It turned out Gentoo is everything I ever wished from a Linux distro.