A friend told me about Ubuntu, but it was a few months ago when I finally had chance to get the LiveCD and give it a try myself.... I was totally impressed by it no doubt. The installing of software is easy, and pretty much anything I threw at it, it did without a struggle.
As said earlier, if you just want to surf the web, email, some word documents and music, then this would be perfect.
I am actually not that picky at games. Quake 1-3, Unreal Tournament 2003, and a few others make it work like a champion.
If you have a pretty beefy machine and want to run World of Warcraft, try and buy Cedega... The app to run many popular windows games in Linux.

Yes as first its a pain to get it to play back DVDs and such since it doesnt install it all at first, but once you go through it, it is worth the experience.
Personally, Ubuntu is THE best distro for users who want to install linux and have it very usable.
Have fun!
