Revert all changes from gnome

[samg34]

Lets get this out-- I screwed up gnome
I don't know what I did, but it looks more like Gnome 2.x.
Is there a way to revert all of the changes to gnome?
I tried reinstalling, but it didn't really help much.

[samg34]

To clarify, I only reinstalled gnome3 not the entire OS.
Would that maybe reset my customizations?

[samg34]

I tried

rm -r .cache .config .dbus .dmrc .gconf .gnome2 .mission-control
sudo apt-get purge gnome-shell
sudo apt-get install gnome-shell
and but it still didn't change anything