Personally I take great comfort in planning and find spontaneous eating kind of scary. I shop once a week and always know what's for dinner which puts a very different perspective on any brief belly rumbles (which are rare). In my past life I would respond with starvation panic and eat a box of macaroni or slip away to the convenience store because my "decent meal future" was a blank fog.
Lots of: urban hiking, cycling, sprinting
Lots of: fresh meat, seafood, eggs, organs, tubers, starch fruits, vegetables, meat fat, dairy fat, oil fruits
Some: cured meat, dairy protein, sweet fruits, rice, pulses, tree nuts, oil seeds
Minimal: soy, refined proteins, sugar, liquid carbohydrate, grains, refined oils, peanuts