The fascinating thing about this stuff is that you can have outlier people. For instance, tobacco is supposed to be highly addictive. Well, I picked up smoking from a girlfriend in college and we used to smoke all the time. Like ten cigs a day for a year and a half. Real bad, right? Well, one day, I decided "Meh. I'll just stop" and I did. Not because of any reason. I just chose not to. Now cigarettes are way addicti…
It's bizzarre the genetic/environmental differences in addiction.