My hubby and I went through this already, and more than once. He doesn't really enjoy smoking, it's a behavior. He's high strung, has to be constantly doing something, does things without really thinking, including smoking. What I absolutely abhor is when he walks around the house with an unlit cigarette hanging out of his mouth (he faces the wrath of khan if he lights up in the house, it's strictly forbidden). I told him that it doesn't make him look like James Dean, but makes him look derelict. I know that is unkind of me; it's also how I honestly see it.
He doesn't enjoy the way it makes him feel, nor does he enjoy how he feels when I bring up the fact that it makes him unapproachable. Even my daughter "nags" him about this.
He knows he is addicted and continues smoking for no good reason. He has tried hypnosis, the patch (that sent him into a near cardiac arrest) and I'm not entirely sure what else. His brother is a pharmacist, and former chain smoker, who has tried to counsel him. He has no lack of supportive people around him.
It is most definitely lack of will in his case.