I love fast food. And unlike most North Americans I actually work out and don't sustain myself on simply fast food, which is why I'm in good shape. People want to blame fast food for why everyone is fat when they should be blaming the individuals eating lifestyle and unwillingness to exercise.
But anyway I digress..
For burgers I love
Big Boy (Its their Lard lad style mascot that attracted me to that place in the first place) and whenever I'm in Nebraska I check out
King Kong Burgers.
Why Universal doesn't buy the rights to this family owned business and go global with it is beyond me. If a clown, a king, and some red head with pigtails can successfully sell burgers just think what a giant ape can do.
As far as the mainstream stuff goes
Wendy's is my fave.
With subs/sandwiches, I love
Mr.Sub (Canadian) and
KFC. I'm a KFC junkie and proud of it.
For pizza its a Canadian company called
PIZZAVILLE. Not only do they make melt in your mouth pizza but I love their whole shtick. The name, the local radio ads of some British guy talking about his love for pizza to their cool logo and tagline.
The tagline is "It was a rainy day in Pizzaville" and the logo features a British guy with a bowler and trenchcoat walking away in the rain carrying an umbrella and a pizza box under his arm.
For the mainstream stuff its
Pizza Hut. They make some of the best pizzas, and I've always loved "Pizza the Hut". Why they don't adopt him as a mascot is beyond me.

"The gigantic octopus is a slimy, loathsome creature and one of Tsuburaya's best creations."
STEVE RYFLE from "Japan's Favourite Mon-Star"