Subway is great, but too expensive if you want a full meal (12" sub, drink, chips)
Taco bell is cheap, but the quality is low (both the food and the restaurants themselves) at least at the ones where I live.
Arbys is straight up and down terrible, the only redeeming quality is the fries.
Burger king is really good, but I always feel like absolute garbage after eating it.
Wendy's has good hamburgers, but their fries are so bad.
Personally I like Harvey's or Swiss Chalet the most, but they're Canadian exclusives.
For an worldwide food chain I'd probably have to say A&W, everything they sell is just delicious, they even have good breakfast.
As in go buy us some coffee.
http://speedhunters.com