For myself, I've tried to continue the "good" with my kids and stop the 'bad" habits of my parents generation.
Like, if my kid is hungry but we are going out for dinner at a restaurant (I'm Chinese, and we do that a lot in our family, its the norm), my Mom would tell me "no, save your appetite for dinner". For me, that Chinese restaurant food isn't that healthy anyways (Fried pork, fried veggies, fried tofu, ) I let my kid eat a granola bar at home before we go. Granola bar is more healthy imo than whatever we are serving at the restaurant.
So I will try my best to be a "cool" Dad that is fair and not continue the silly-ness of the older geneeration, so when I become old, I don't end up doing the same as before.