Unity is good and fine, and does it's job (my machine running Ubuntu is simply my personal computer, no programming or anything being done) but sometimes it leaves a little to be desired. I have tweaked Unity about as much as I can since installing it but I'm still interested in trying out differnt DE's like Cinnamon and Gnome. The issue is the last two times I tried installing Gnome via PPA base on omgubuntu.com's instructions, it broke unity and I had to fresh install Ubuntu. Granted that was on 13.10. Now I am becoming interested in trying Cinnamon out, but don't want to risk compromising my computer...is it really as simple as this?
TL;DR Help me install Cinnamon ALONGSIDE my current unity without breaking system.