One of the powers of Linux and the open source movement is the freedom of choice. If the software you need exists in one flavour, it most likely have more flavours out there somewhere. This also comes to desktop environments in Linux. If you are wondering what a desktop environment is, look at your own desktop, and note the file manager, panel with menus, quick launch icons etc. That is your desktop environment.
For a Windows user this concept is quite confusing, as it Windows only comes with one desktop environment, not counting projects like Cairo Desktop Shell. In the Linux world, this is a common term, and everyone have their favorite, from GNOME to XFCE, and even LXDE etc. Read more of this post