To go along with the article honeychile posted, I have done a bit too much study on food and have since not really eaten at any traditional fast food restaurants. I just cannot do it. But, I will eat at the following places, which would be my only tier:

Qdoba
Panera
Noodles & Co
McAlister's Deli
Jimmy John's
Crazy Bowls & Wraps (local chain fast food restaurant that should really expand. Google them, I'll bet a lot of people would like them in their area.)

first teir!!!

also, Bullets which is basically the same thing