There is nothing but harm to your body, and enslavement for you. In fact, becoming addicted to cigarettes makes you unhappy .. because there are hardly any places that you CAN smoke, and so you will spend most of your waking time wanting a smoke but not being able to have one. Work, school, public places, movie theaters .. .instead of looking to enjoy your experience, all you do is fret and get agitated WANTING a cigarette. You become a slave to the smokes, and they are not kind to you.
To say nothing of the health problems that you WILL get, and once you have them there is no cure and they just get progressively worse over time.
I have a friend who cannot go anywhere without carrying a 10-pound oxygen tank, and the tank only lasts 2 hours, so she MUST get home before 2 hours are up. Do you have any idea how much that imprisons her life?
Plus of course .. she had to quit smoking, and addictions are hard to quit.