4. Burger King
I second this!
Using the original 5 fast food chain choices given, I agree with the order given by tkitna and chewingthefat.
Picking my own top 5 fast food chains, I'd probably rank them as:
1. Five Guys
2. Steak 'N' Shake
3. Fatburger (They're only in 8 states. Nearest to me is in MD)
5. Hardees (for their biscuits and hot ham & cheese)
If very small, very localized fast food chains are allowed, I'd add:
Walt's Roast Beef (5 locations in RI).
Jake's Wayback Burger (In northern DE and northeastern MD)
EDIT: I just looked up Jake's Wayback Burgers. Apparently, they are not as small anymore. There were just a handful of locations in northern DE a few years ago. Now, they are in 15 states with about 60 locations.
<message edited by Glenn1234 on Sat, 11/17/12 8:05 PM>