A great strength of Linux, and open-source in general, is the number desktop environments available. For those who want something full-fledged with many utilities there's KDE and Gnome. Older computer users or those who just want to use less resources can go with XFCE and still have many of the benefits of the larger desktops. The minimalists use Fluxbox, LXDE, and Ratpoison where everything is set up by the user. However, with a sizable following, Enlightenment strives for a feature-rich yet visually stunning experience for the user.
Unlike Gnome or KDE, up until Enlightenment 17 (also known as DR17) it was only a window manager. However, DR17 has not yet reached a stable release. A major project, the E team is rewriting the entire code base but many distros still chose to go with DR17. As always with beta software, backup your data just in case. For those who want to try Enlightenment but worry about using a beta, DR16 is still maintained and is included on many distros.