It was almost 1 year ago that I got disappointed with Ubuntu Linux; After more than 4 years that I had been using it as my first Desktop operating system I left it for other distributions. They become somehow against
Gnome 3 shell and developed their own
Unity. The unity was not as light as
Gnome 3 and was not supporting all hardware (in compare to Gnome 3 shell).
Since then I have used several distributions. Debian (my favorite server distribution), Fedora and Linux mint.
After 1 year I installed Ubuntu 12.04 2 days ago and I can say they have solved hardware compatibility issues and it is not that much sluggish as it used to be.
Still I do believe
Gnome 3 is more user friendly and they have their own philosophy in desktop, but
Unity's sidebar is still originating in
MS Windows taskbar.