For me though, it's more like the old Manowar saying, "If it's not in your blood, you'll never understand". The people who were generally into heavy music and a philosophical/individual outlook on life as teenagers are still that way today, twenty years later.
Those who are fat and boring today were thin and boring 20 years ago. I'm sure there are people out there who used to live life their own way and who now don't, but I think once the fire is lit, it tends to stay with you through the different phases of life.
Take me for an example. I've got a family, house and all the ingredients that should render me a suburban untermensch, like the sorry sacks of shit who pass for my brothers-in-law. But I bring the Mayhemic spirit of atavistic screams to bbqs, while they bring pasta salad.