I've noticed that carbs fill me up a lot less than protein heavy foods. Example, if I eat a carb heavy diet I find my appetite is not satisfied unless I pull in about 4.5k calories per day, whereas with a diet more oriented towards protein I can feel satiated with only 2500-3000 per day. The big problem with carbs are the simple ones, the amount of sugar and starch I see some people eat is ludicrous. Now there are cases where this can help, I admit that I hit the carbs pretty hard when going on endurance runs, but your average sedentary person doesn't need to be eating 400g+ of carbs per day. In fact, as long as I limit my workouts to an hour or so, I can go sub 100g without much problem.

I used to be a cereal fiend for breakfast, I'd eat 2-3 large bowls of sugary cereal which would pull in around 1100 calories (which isn't really bad, I still eat around 800 now for breakfast) but I'd be hungry again an hour later.