When I first heard of Linux back in 1993, the SLS distribution was my first foray into it. It was a broken distro so it was a rather bittersweet introduction.
I then tried Slackware when it first became available and wow, I had my very own UNIX(tm)-like box! I used it for a while then went back to Windoze 3.11 because, well, the applications. I then went to Red Hat 4.2 and kept upgrading it till about Fedora 11 (I recall all the controversy when Red Hat went to libc6 :) when I decided to switch over to Ubuntu. I've been using Linux as my full time OS since 1998 when I got fed up with Windoze and the BSOD.
After reading this article I downloaded the ISO images and installed Slackware 13.1 via VirtualBox. And yes, the Linux landscape has changed radically. I've been spoiled by all the polish that's be put into Fedora and Ubuntu; I'd forgotten what it was like to have to hand edit inittab and XF86Config/xorg.conf. Rather embarassing!
I'm still going to keep Slackware on the VirtualBox. My geek skills have atrophied a bit. :)