Feeding on demand worked so well when kiddo was nursing, we just kept it up.
By 2 he had his own shelf on the fridge door (with sippys of milk, yogurt, leftovers that need refrigeration, etc.)... and his own "drawer" filled with things that don't need refrigeration. I'd cook 3 times a day, and whatever he didn't eat would go on his shelf.
We noticed some really interesting things.
- He eats the way nutritionists recommend we eat (and don't as a culture). Aka several small meals a day. Typically 5 or 6.
- The VOLUME of the food he eats really tells what stage he's in growing-wise. (There are weeks he eats double what my husband does -aka 4 times what I do-, and weeks he eats less than half what I do). If he's doubling what my husband eats, he's about to chub up... and then we will have a MAJOR growth spurt on our hands. As in, time to buy new shoes and clothes. He gets a couple inches in these spurts usually. Then all of a sudden, he only starts nibbling at food... and starts shooting up. He goes from chub to seeing all the vertebre and ribs in about 2 weeks flat. Then he eats "normally" again... which is right around the same amount I do for awhile).
- They TYPES of food he eats is also really interesting. When he's in a "large motor" phase, there tend to be lots of carbs piled on top of what he "normally" eats. There's always always high fat content in his food, except in very hot weather + a lot of physical activity... and then his fat consumption drops by about half. (He'll still drink milk, only about half as much and trades the other half for icewater... yogurt switches for fruit... meat switches to high protein veggies/legumes or legume+grain combos).
- Nothing in our house is restricted. In fact, certain veggies & fruits & meats (like scallops) are as big a treat as icecream. "If you're really good we'll .... cook an artichoke/ make saag paneer/ let you skewer the shrimp for the Q/ bake an apple..." apparently creates the same desire "If you're really good we'll have cookies/ icecream/ candy". In fact, it usually takes about 10 months for halloween candy to get totally consumed.
- There are also trends. Like the hot weather = hummus and pita over meat... or cheese sauce... or salty... or sweet... or dark green. When I start noticing these trends... I've tried limiting (not limiting foods is a LEARNED thing for me), and I've tried just making more available. When I limit... the phase goes on and on and on... when it's available EVERYTHING is covered in cheese for a week or so, and then, the phase is over. Some phases are really strange (like sauerkraut and avocado phase), some are totally normal.
It's really fun to watch.
It also drives my mother up the freakin' wall.
My feeling is that we had set mealtimes, and all these rules around foods (good foods and bad foods, treat foods and "you have to eat it" foods, and "I cooked it you will eat it and enjoy it and show some respect" foods) and all of us struggle with our weight/ relationship with food. One of my aunts on the other hand, did something similar to what I'm doing and got the exact same results I'm getting.
As far as table manners go... we make it a game. We eat in different cultural styles all the time. And teach the "tricks" to dining (aka do exactly what your host/hostess are doing, plus looking at the people seated immediately near them for confirmation for guest behavior). It's a "but of course" trick because we travel... but we also do it at home. AKA pretend to be at a restaurant (family, casual, upscale, or posh) in America, Japan, UK, Middle East... pretend, pretend, pretend. When he's older we'll actually enroll him in a dining class at a local hotel (most offer these for kids... they teach everything from which side you're served on, which silverware to use when, how to "talk with your silverware" and "talk with your glasses")... but really no matter if your at a campout, the ghetto, suburbia, or being served 6 courses... the trick of watching your hostess will see you through 999 times out of 1000. (The one time it won't is when a guest is supposed to eat first, and that's really really rare in this hemisphere). Because it's just as rude to be using the wrong manners upwards, as it is down. If other people have their elbows on the table, you put yours there as well.
I'll never forget one of my dining lessons as a child. "If you show up to a dinnerparty, and your hostess is stark naked... you ask where to hang your clothes. And then you strip down to exactly what she is or is not wearing."