I have never tried another linux other than ubuntu, but I recently tried gnome shell in ubuntu, and even though I am a huge unity fan, im starting to think I may prefer gnome shell. after gnome shell Unity is starting to feel cluttered. you have the first screen of the dash with large and tiny icons that feels like it was designed by an independent team. Then the app menu: you have "most used" which is redundant what with the ability to pin apps to the side bar. You also have the recommended apps that I never look at, leaving very little space for your normal app menu.
The only thing I miss is the way unity docks all the menu bars into the top task bar, freeing up more screen real estate.
I also dont like that gnome shell got rid of the shutdown menu as well as the minimize and maximize buttons- though in all fairness those are simple enough to get back.