My current favorite is Cheeburger Cheeburger. Good burgers, great frings (fries and onion rings ), and the best shakes ever. Check out this odd locations map;
http://www.cheeburger.com/locations.asp
One of my other favorites is Krystal burgers, sadly about the same distance away from me as Jack In The Box.
White Castle under a different name. Porcelain seating is mandatory within 3-6 hours of consumption.
Their coffee is excellent, however.