Foresight is a great introductory distro
like linux mint or something
a sort of dipping your foot in the linux pool

Ubutnu is a step up, in terms of geekyness but not alot
but you cant beat how supported it is with a 40 pound club

One of my favorite "serious" flavors is arch linux, takes some time to setup, but you get a really lean system that will do what you want, and nothing you dont


What are you using this for, if you dont mind?