Back in the early 90's, a friend/co-worker introduced me to this new fangled thing called Linux.
Back then, it was distributed on 20-30 floppies, depending on what support you wanted to include. This was Slackware, and was pretty slick for the time.
My how things have evolved. Today, we have a multitude of Linux distributions, ranging from simple to down right complicated (at least for some).
Personally, I have used a variety of distributions ranging from Slackware, RedHat, Debian, Mandrake (Mandriva), Kubuntu and Gentoo.
My current liking is Gentoo, but I do not recommend it for the faint of heart. Instead, they should consider Kubuntu (my wife did and has not needed M$ since).