Ok, so I don't typically eat the burgers, but I do eat at every airport I fly to, if possible. While Katama was the most fun to visit and the coolest to land at, Nashua (KASH) is so far my favorite for food. The cool part is that the lady who runs the joint is married to the ATCer in the tower. They both have these no-nonsense personalities and aren't exactly warm-and-fuzzy, but you can't help but love them anyway.
Did they tell you to"line up and wait"for your lunch?
Ever been to Portland, ME(KPWM)? If you're into seafood, they get it right off the boat.