I am very happy that Ubuntu GNOME is present. This means no unity for the next 3 years ;-)
At the risk of starting a flamewar, is Gnome 3/Shell really any better? I've never felt quite so unproductive as when I use Gnome nowadays.
Much less cluttered than unity (most of the time you just have a single black bar at the top of the screen) and handles workspaces nicely.
I never liked gnome 2, though, so take my opinion with a grain of salt.