Food issues are so hard to deal with and run so deep.
We started out with the free feeding method with dd1. We had both healthy food and some junk in the house. We didn't restrict the junk..and allowed her to choose whatever she wanted to eat. The result....we ended up with a child who was considered obese at the age of 3 1/2. She gained
14 pounds between Feb when she turned 3 and the following Oct.
Thankfully, we figured out what the problem was and put her on a gluten free/caesin free diet.. (for behavior issues), but it also solved the rapid weight gain..and she basically hasn't gained any weight in the last 1 1/2 years...so she is growing into her weight. But, the nature of her problem, is something we would probably have never discovered if weren't looking into alternative treatments and thinking she had autism (she doesn't).
Anyway, I really believe that free feeding can work for some kids..but NOT for others. Honestly...I think some people just genetically LIKE food more, and more INTO food. Really. Even if you look at animals and pets, it is the same way. We have a rabbit now..and I hvae had rabbits in the past. Some rabbits, you can fill their bowl up with pellets, and they will eat it over several days as needed. Other rabbits, will scarf the whole bowl down at once. Some rabbits will turn away from some veggies..others will eat almost anything, any time. It really doesn't have anything to do with the way they are raised..it is just their genetic make-up. I firmly believe it is the same way with people. Some, people LIKE to eat more. Some people's body chemistry's are more affected by food..so they are more likely suffer from sugar addictions or things like that. Some people have more sensitive blood glucose systems, and are more affected by that.
I have always loves to eat...always have. As a child, I used to wish I coudl be a horse or a giraffe so I could just graze all day (I think I was bored a lot too.

). I was raised the same as my brothers and sisters (mostly healthy food, junk food available occasionally, weren't free fed junk, but also weren't super restricted), and I am the ONLY one with food *issues*. Thankfully, I have a good metabolism and am active, so my weight has always been normal....but I defintiely had/have issues.
Edited to add: I am not saying that way one is raised has NO bearing on the way they view food. I defintiely think many people develop food issues, because of the way they are raised. However, I also think some people are BORN with food issues...or at least an increased desire for food.