Abuse of smoking might be a sin because the body is God's temple (1 Corinthians 6:19), so a pack a day-er might be indulging in sin. However, smoking does not affect your mental make-up like alcohol, and drugs, and even alcohol, taken in moderation is not harmful to the body. So, I'm giving it a pass, too.
Now I might be wrong, but frankly, I've got much more serious sins to account for. Thankfully, they are under the blood. But I can't worry about those two.
I imagine most any indulgence carried to extreme would be a sin. I won’t be throwing stones anytime soon.
As Freud once said, “Sometimes a good cigar is only a cigar.” A lot of tattoos are, or used to be, only the remnant of an out of control night in Tijuana. A reminder of something you can’t remember.