I may use a Mac as my daily driver these days (Still has the apps that my job mandates, but still has access to Unix utilities), but I daily drove Linux all the way back in high school with a silly little distro called Ubuntu Ultimate Edition. I loved it, but I eventually had to switch back when I got to college since I needed to run certain apps that didn't want to support Linux. Still though, I've kept a Linux machine around for tinkering or server use in some fashion ever since then!