From a very early age, my wife and I told our son that there are times and places for everything. I told him, look, when you're in class, you have to be quiet and listen to your teacher, but when you go out to the playground, you can scream and be silly.
True happiness for me is playing a concert in Blink-182, and then hanging out with my friends and my wife and son, and going out for Mexican food.
All I can hope to do is instill great morality in my son and trust him along the way. The music he listens to or how he chooses to wear his hair doesn't define his moral compass, and if he wants to listen to country music and wear a cowboy hat too, that's fine.