Me too! Looking at my old windows 98 machine and then at slackware Linux with enlightenment lured me to Linux and began a lifelong journey!
SuSE 5.1 for me, as it was what I could easily get the CD-ROMs for, as bandwidth was just a single 64k ISDN at school.
Same for me. Slackware (I guess 4.0) and E16 was my first proper Linux installation. Learned so much during that time.