"How dreadful!" cried Lord Henry. "I can stand brute force, but brute reason is quite unbearable. There is something unfair about its use. It is hitting below the intellect." ~ Oscar Wilde - The picture of Dorian Gray
Good? The trend I've noticed is for people to assume Ps are younger than they are, more often than Js.
Was actually referring to the lifestyle described. Nobody continues to feel good as they age if he/she abuses the hell out of him/herself. It's a tortoise/hare thing really. A J that pushes it will crumble as surely as a P, and vice versa. I don't know anyone, P or J, that carries on (or even wants to carry on) in the manner described by the OP much past their mid-forties. If you've managed to do it, more power to you!
For most of us, the transgressions of our youth don't begin to really manifest themselves until the late thirties.