I hate this thread.
First, I felt like "Goddamn, these desktops look awesome! Why can't my linux look this good?" I guessed that it was because I was using Unity, so I uninstalled unity-2d.
I felt like trying out a new Desktop Environment; my linux machine (a laptop) isn't that powerful, so I looked around for a lightweight one, and settled on LXDE. I played around with it for a couple of hours, trying to change some default settings to make it feel a bit more like GNOME. It was pretty cool, but my brother (who was looking over my shoulder at the time) said it looked like shit, and wanted MATE, so we could use GNOME 2 again. I botched the removal of LXDE, so it remains on the logon screen, and MATE irritatingly brings its own versions of GNOME applications, so I've got 2 copies of system monitor for example.
Now I'm considering making a backup of my linux folders and setting up Arch Linux with MATE or something else on the recommendations of everyone on this thread. It was 3 PM when I started this. Now it is half past midnight. Damn you guys.