After exhaustively looking for a different desktop environment for Linux, I can say that XFCE is still number one in my book.
I have tried just about all of them, including window managers.
Gnome, Unity, KDE, Cinnamon, Mate, LXDE, Openbox, Enlightenment, Blackbox, Fluxbox, i3, rat poison, awesome, fvwm...
If you name it, I most likely tried it. (I know this is no where near the full list.)
Why do I like XFCE? Simply, it has just enough bells and whistles to be easily used by most people, and yet it is very light on resources.
It's a tricked out pony, especially if your number one concern is functionality.
I personally like Xubuntu's slant on things, making XFCE just pretty enough to be gentle on the eyes, without compromising speed and stability.
This is my screenshot. An awesome desktop environment.
I seriously suggest you try XFCE with your distro today.
And if you are an Ubuntu user, then try out Xubuntu!