Well I do not want to sound offensive, and I can only speak of what I have experienced, but I have gone though many phases in my life when I would drink every night for like 2 years in my late teens, and I have done most drugs, but other than pot most with out any real regularity as in every day or other day. I have even done meth, but do not like how it makes me feeling the next day so did not do it very often at all. Will with all this use it was never what I would call addicted to any of it, I stopped drinking cuzz I just got bored with it and like the other stuff, I never have any overwhelming urge that I have to keep doing it. I personally think allot of the substances addictions are genetic, but that maybe just from my point of view. LOL in fact I can not get a rash from poison ivy or poison oak for that matter