The best passage in the Bible for dealing with any potentially addictive habit would be:
I Cor 6:12 All things are lawful unto me, but all things are not expedient: all things are lawful for me, but I will not be brought under the power of any.
I Cor 6:13 Meats for the belly, and the belly for meats: but God shall destroy both it and them. Now the body is not for fornication, but for the Lord; and the Lord for the body.
I Cor 10:23 All things are lawful for me, but all things are not expedient: all things are lawful for me, but all things edify not.
I Cor 10:24 Let no man seek his own, but every man another's wealth.
The question should not be "Is there anything wrong with smoking?" The question should be "Is it expedient? Does it edify? Is it something that would cause someone to stumble?"
If you think you can smoke and not get addicted and not get health problems, fine. However, think about it:
* What if
your smoking caused a weaker person to be turned away from receiving Christ because that person knew of someone else who had died of lung cancer because of cigarettes and your testimony did not help your witness one bit?
* What if your strong health allowed you to smoke, but your condoning of the worthless habit caused a weaker one to acquire the same worthless habit and then suffered the consequences? Wouldn't you feel to blame, with that person's blood on your hands?
* What if your second-hand smoke affected the health of those with weak lungs around you?
It is a worthless, costly, unhealthy habit.
If it is not expedient or it has the power over you (addiction), follow Paul's example.
The same would go for alcohol, drugs, over-eating, etc. Any of these habits that (1)do not improve your health, (2)are addictive, (3)could possibly cause a poor testimony to weaker believers or the world, (4)cut unnecessarily into your budget (that could be used for much more profitable things for your family and others), and/or (5)supports those whose main purpose is to continue to lock you and others in the same worthless habits, should best be avoided by believers whose main purpose on this earth is to impact others for Christ.