I love to try new things out. In that respect, I love trying different various desktop environments on Ubuntu.
Ubuntu comes default with Unity desktop, but you can install other desktop environments as well. To install Ubuntu desktop environment, simply run
$ sudo apt-get install -y --no-install-recommends desktop_environment_to_install
where desktop_environment_to_install can be any of the following corresponding to the desktop environment in parentheses:
When you have multiple desktop environments installed, you may be able to choose one at the log-in screen.