Ever since Ubuntu moved to it's awful Unity desktop environment, I've looked to other environments that work better for me. For a while I was using XFCE in Xubuntu, but I eventually fell in love with Cinnamon. It just had a smoother feel to it that I liked.
Anyway, in the past you had to add third party repositories to install it, but in Ubuntu 15.04 it is available in the Ubuntu repositories according to user Ginggs on the My Broadband Forum. To install you should only have to run:
sudo apt-get install cinnamon-desktop-environmentThat should work fine in a clean install of Ubuntu 15.04, but if you are like me and had Cinnamon installed in a previous version of Ubuntu you will have to clear up some broken dependency issues first.
Oh, the joy of Linux right?