One of the things about acting is it allows you to live other people's lives without having to pay the price. I've never been one of those actors who has touted myself as a fascinating human being. I had to decide early on whether I was to be an actor or a personality.
As an example to others, and not that I care for moderation myself, it has always been my rule never to smoke when asleep, and never to refrain from smoking when awake.