I use fedora core 4 and love it, i also got Linspire (Free cuz they had this offer) and a few others and love the hell outa my Redhat
Currently using it at as a router for my room
Data Storage
IRC bots
and general hacking/networking admin stuff as practice
its amazing what you can do with a nix system, and its amazing having a system only do what you want it to do. Just as good as windows if you get roms, or find a linux solution to a windows application