As i observed drug scene during last 16 years, also be in part of it, I think addiction is very general term. I categorize drug users and abusers in three general groups:
1. Reality escapers: This people uses drug mind altering effects to escape from reality. The reality is here means old mistakes that person done, hardness of life, bad vision of themselves, etc...This group will be highly addicted to alcohol, benzos, opiates and stimulants.
2. Just for fun users: This people uses drug with community. They use them as socializer or entertainer. This group will use alcohol, cannabis, inhalants and stimulants. They generally use with alot of people together and make parties. This group is also unlikely to be addicted.
3. Mind Explorers: This people uses drug to alter their mind and to see theirselves from outer. Like near death experiences, different ways of communication, energies, etc...This group will be less addicted. Their best drugs are psychodelics (lsd, mushrooms) ,dissosiatives (ketamine, dxm) and also delirants (anticholinergics).
I recommend every drug user to read 70's great psychodelic explorers like Timothy Leary, John Lilly, etc...Learn eight circuit model of consciousness stuff and read alot. If done properly one can really induce higher level of consciousness without any drugs. Be aware that every drug that is considered as psychoactive is a derivative of natural thing and also is a somekind part of your own body. Just more powerful version but they are already inside your body readily, waiting you to explore them. If you belong to first group you must realize that drugs or any other addictiveness (i mean obsessive compulsive behavior-sex,money,power, etc...) can not alter or fix the real problem. So as my point of view, addictiveness is not just a choice of abuser, it is problem that abuser can't solve and somekind of a exit path, and also leads to destruction of body at the end.
Just my opinions...