Anyway, we can simply install Gnome-shell on Ubuntu, which will give us both the modern Gnome 3.x interface (which some think is as bad as Unity) as well as the classic-look Gnome, with the traditional menu bar at the top of the screen. To install Gnome, open a terminal and type:
sudo apt-get update && sudo apt-get install gnome-shell
When prompted, provide your password, and answer Y to the prompt to install the components. After the install is finished, logout. At the login screen, click the gear symbol and select Gnome Classic as shown below.
There you go. Now if you want to tweak the look and feel of Gnome Classic on Ubuntu, have a look at: http://www.itadmintools.com/2011/11/tweaking-gnome-classic-on-linuxmint-or.html