Went cold turkey after smoking a pack, pack and a half for 30 years, god was that tough, I don't know if drug addiction is worse but you'd walk past some one smoking for months afterward and the craving would sink it's needles in you, it took at least 3 years for the craving to go away. Now I can't stand the smell of the things, almost as bad as a diesel truck, with the asthma I've got now, if I hadn't stopped so many years ago I would've been a prime target for lung cancer, butts weren't the only thing that was a problem, sand blasting without breathing protection, metallizing the same, working in smoky bike shops (2 strokes), A/C engine test cells, compressor changes in fridges (running F12 through flame) etc, now of course I live in a place with, possibly 100 trees around me and that helps (and I'm going to plant more next year once the house is done) more oxygen. I'm not very coherent this morning, sorry.
Bill the demon.