Okay here goes my smoking story...
Started when I joined the Navy and was hooked before I knew it because almost everyone did it back in the early 70's. 34 years later I went to my doc and told him I wanted to quit but was concerned about the physical side effects. He prescribed Welbutrin and tole me to take 2 a day and when I "felt like not having another cigarette, just don't." Within a week I finished a pack and decided I was done. He told me I needed to continue the Welbutrin for a complete year after I quit. I didn't listen, took it for about 6 months after quitting and about 18 months later I started smoking again.
I went cold turkey in 2010, smoked my last cigarette the day before I went on vacation to the Caribbean. Best thing I ever did. I was away from any excuse I used to smoke, was relaxed and care free on vacation and had no real desire to smoke. When I got back from vacation I traded my Tahoe for a new one that didn't smell like cigarette smoke (with the wife's blessing) and I haven't had a smoke in 3 1/2 years.
I've gained about 20 pounds because I figured out the smoking thing was all about keeping my hands occupied. Today I pop jelly beans, nuts, M&Ms.... and I'm working to get the weight off, but as the wife says, "I'd rather have you overweight and alive than smoking, skinny and dead." But I have made a couple doctor visits and there doesn't appear to be any long term damage and he said my lungs are already almost completely clear of any evidence that I ever smoked.