I don't like KDE 4.X and switched to Gnome kicking and screaming. Gnome 3.X is the pits IMHO. Unity...... Shudder to think. I installed XFCE and I like it! http://www.ghacks.net/2010/07/07/installing-and-using-xfce-4/ It's a light weight, or maybe middle weight would be better, desktop that just gets out of the way and lets you get things done. If you like the rotating cube and plasmoids and an animated background then it's not for you but if you switch windows a lot and use a terminal and like getting down in the bowels of the machine, have a look. Last night at our LUG we had a discussion of XFCE vs. LXDE vs. Unity. Gotta love an OS with choice.