This is just my opinion, but I think one thing that I haven't seen mentioned much is that modern diets (by which I mean foods) leave your stomach more empty tha

This is just my opinion, but I think one thing that I haven't seen mentioned much is that modern diets (by which I mean foods) leave your stomach more empty than it should be for a given amount of calories absorbed. If you eat lots of whole foods, prepared the right way (e.g. steamed instead of fried in oil or fat) you body will 'see' less calories for the same stomach 'fullness'. (I've done a bad job of expressing that - I hope someone will chime in with a better description and more information).