Outside of early releases of Red Hat, Knoppix was one of the first Linux distros I spent much time with. As a matter of fact, it was the most used recovery tool I had in my tool box back in my PC repair days.
Back then, I used Knoppix all the time for data recovery, among other recovery type things. But I fast found it addictive, thus I installed in directly onto my notebook at the time with an old Orinoco wifi card.
So when I had a chance to come across this interview with the man behind the distro, I found it interesting to read a bit about his motivation for creating Knoppix and also some of the influences behind specific features.