I'm also eating less, much less - I have a personal theory that one of the side effects of the modern diet is that the feedback mechanisms to control hunger are disrupted.
So true! Take McDonalds for example. The chips and softdrink do nothing but make you hungry, the burger buns have 8 teaspoons of sugar (and therefore make you hungry), the meat is fatty, and most importantly (I think) - you barely have to chew. Chewing sends a message to your brain that you're becoming full, but with fast food, you hardly have to chew it and so that message isn't reached. Also, your body doesn't have to work hard at all to extract the energy (and, theoretically, nutrients) which means you get hungry faster. The whole fast food thing is designed to make you eat more, and the more you eat, the hungrier you get. When you are full, because the food is so easily digested, you're hungry again soon after anyway. It's a total scam!