I never feel full on meat + vegs, but adding a bit of bread does the job. Conversely, I never feel full on bread or rice or generally carbs only, adding a bit of meat does the job. It seems I need the combination.

My subjective experience is that starting a meal with a small amount of insulin spiking carbohydrate and then moving on to protein and fat results in feeling full faster than starting with the protein/fat and moving on to the carbs. I generally have a rule about portioning my food out at the beginning of the meal and not going back for more until 20 minutes after I finish the first portions. Usually this prevents me from overeating, although eating imbalanced meals almost always leaves me hungry long enough to get second helpings.