Every person is different, as is their personality.
Some people have more addictive personalities than others.
Nobody can be sure of their own addictive nature before they try an addictive substance, such as tobacco. The only way to keep from becoming addicted to tobacco products and cigarettes is to never try them in the first place. Nicotine is not only physically addictive, but also psychologically addictive and habit-forming. Usually, the physical addiction can be overcome. But people who have an addictive personality are much more difficult to wean off of tobacco.