Snacks -
gorp, with lots of m&m's and fruit in it.  Can eat that all day.  
raisins: I usually have a box of raisins in my pocket when fishing/hunting for a quick pick me up.
jerky - sometimes a nice teriyaki flavored dried beef can really get your mouth watering.

missed foods:

Bread was something we missed on our trips until we started taking ingredients for fresh biscuits.  Before that, tortillas were as close as we got.  

I think there's always a desire for greasy food.  A cheeseburger or steak and french fries is an excellent first meal once you return to civilization, regardless of whether it's a weeklong trip in the Q or a weekend backpacking trip up Penn's Creek (a little bit of heaven here in PA).  Perhaps it's the natural desire for the intake of fat after a prolonged period of a rather low-fat diet.  Perhaps it just goes well with the beer.