"since '91"?
I first heard of it in '93 and followed it closely, but put the majority of my efforts elsewhere (wanted a "respectable" distro for my resume -- *sheesh*). Never stuck with Linux until I finally got fed up with trying to look good and to get serious about this. With that, I *knew* the distro I wanted.
They say people who use Red Hat learn Red Hat, people who use Debian learn Debian, but people who use Slackware learn Linux. There was never any question. Been in solid since 10.
This Slack64 13.0 is just a dream. Haven't tried multilib yet (what for?), but I know there are several 32-bit only applications out there that would balk at the 64-bit libraries (though I can't think of any off the top of my head right now).