Nicotine isn't very addictive for me at all. Some days I smoke a whole pack, some days I don't smoke at all, and I never have withdrawals after smoking for years now. In general though, I smoke about a half-pack, maybe less (it's hard to say since I bum a lot out). That's probably why I don't get addicted, I think you need to have steady nicotine concentrations in the brain throughout the day to become dependent.