Personally, I'd love it if fast food places offered small sizes other than the kids menu. Mmm... if McDonalds made a Mini Mac combo, with a small fry and kid-sized drink, that would be great. 700 calories, almost no redeeming nutritional value, but not as much damage as a normal Big Mac Combo (not supersized). A reasonable 3x/year treat.
Right now I order off the kids menu, but there's not as much variety as on the adult menu. And if I'm going out for fast food, I'm NOT in the mood for a salad!
-Amy