Maybe you are disappointed by Unity and looking for something new? But you would not like to go away from the known Ubuntu environment?
Of course, Ubuntu like any Linux distribution, you can customize the look and the behaviour in the way you want. Depending on the knowledge you have, it will be more or less successfully. Or if you do not have time to adjust, try some of the already finished remaster . You may find some that you will like.
Arios and gNatty are two remaster of Ubuntu using Ubuntu 11.04 as a basis for the operating system.
Arios is configured to be an usable distribution, while gNatty it’s just an interesting concept that still needs a lot of work.