Here' my scoop of raisins on that subject.
1) I check to see how many carbs (carbs raise my glucose - diabetes)
2) what (generally) is the glycemic index or how fast will glucose level rise
3) then If a bread is it whole grain or processed
4) then I look at fats
I don't care about calorie count, since I eat 5 - 7 meals, so the caloric count is low no matter what
proteins are safe food or all I want to eat, as long as fairly low fat or good roast beef - tacos, fluatas, etc with preferably whole wheat if not then corn tortillas Carnitas and Pollo is good too.
I have a vitamin / mineral regiment, so I kinda' don't worry about it. I'm on out post 88 on the planet earth according to a hub I wrote so space food :)