I doubt these days you can go too wrong if you stick to the popular ones. Personally I use Xubuntu. It feels a little lighter weight than Ubuntu/Kubuntu and has

I doubt these days you can go too wrong if you stick to the popular ones. Personally I use Xubuntu. It feels a little lighter weight than Ubuntu/Kubuntu and has all the desktop features I want plus ability to tweak the things that bothered me. Also, fyi, http://askubuntu.com/ http://askubuntu.com/ is an incredibly helpful resource if you choose any of the Ubuntu distros.