I appreciate your consideration but if you smoke regularly, chances are you don't truly realize how bad you smell and just how far the stench carries.
Also the argument of dying early is flawed. It's not just about dying early, it's about the quality of life you'll face at the end of your life. I don't mean to freak you out, but heavy smokers have a LOT of trouble doing anything physical in old age (climbing 10 stairs, standing up, walking a few steps, eating,...). I've seen firsthand how my grandpa that liked to take walks for hours a day went to basically disabled, in the timeframe of roughly ~15 years. All due to decreased lung capacity caused by smoking.