Ubuntu is fast becoming a popular choice for people wanting a capable Linux-based desktop environment. I like it (although I admit to using Gentoo because it appeals to my development needs). Although I generally recommend Kubuntu to most new users. Ubuntu is popular because it comes pre-configured with a lot of the applications that people need, right there, out of the box. Well, off the CD. Or DVD. Ubuntu is also available both as an installable version, so you can place it on your hard drive, and as a Live CD, so that you can try it out before you install it.