Expat--this is a very interesting question.
I eat quite healthily now without having to think too hard about it, but I actually didn't really have a good example set during childhood. There were a number of factors that contributed to this: my mother was a single, working parent and suffers from a chronic illness. She did the best she could, but home cooked dinners were definitely a rarity. I was also a serious ballet student throughout school, which meant that I often had classes from 6-8 every weeknight--not exactly condusive to family eating. Suffice it to say there was a lot of take-out and eating in the car. When we did have home-cooked meals, they were often quite heavy (lots of beef and heavy sauces). And the portions were huge!
One thing that we didn't do, which I believe helps me now, is have dessert every night. Dessert was very much a special occasion thing in my house. My husband ate dessert every night at home (usually homemade by his Mum) and now has to have something sweet after dinner. I can quite happily do without it. I'm lucky in that I don't really have a sweet tooth. However, my savoury tooth--that's a different story.
I think I have a pretty good relationship with food now. I generally eat healthy (with the exception of my cheese and curry addictions), but don't deny myself anything. My husband, on the other hand, who ate only homecooked food his entire childhood has a bunch of issues Go figure!