I am thinking about adding something besides unity into my ubuntu 12.04.

My questions are this: -If I add cinnamon, mate, gnome2/3, could I still call it it Ubuntu, or would it be Mint? -Why not just add Mint instead of cinnamon, or mate, into Ubuntu? -Or is Mint just those at the core, and not the other way around? -I had terrible battery drain using Mint. Something was wrong with the kernel with my laptop type. If I add cinnamon, would I get that battery drain again? -And lastly, would I be able to get that awesome HUD if I add the other things?

I realize these questions are a bit confusing, or at least they are for me.