I haven't been addicted to any substance, even those I've had more than a moderate helping in. I've smoked (cigars and cigarettes) and drank (liquor, beer, caffeine, the works), but I refuse to use drugs since doing so would void my contract with the Marines (and it's stupid anyway). None of these things got me hooked, despite my prolonged use of them. I could walk away whenever I wanted, and I have. Currently a straight edge kind of guy and have been for six months. Wouldn't mind a Guinness right now, however. Mmm dark.