drug abuse is really not a textbook thing, and if it was the textbooks would be so heavy in volume that no one person could carry them and would probably die under the severe weight of such volumes of paper.
the four qualities that your doctor described i find common in most if not all people. different people deal with these things in different ways, eg shopping, working, taking drugs, or having sex, etc etc. no one way is guarenteed to satisfy you because life is always about growing and developing your personality long after you think you've 'grown up'. so people jump from solution to solution and do whatever makes them feel best at that moment.
your social environment plays a big role in this, because social circumstances, advertising, friends, all that crap, influence your perception of how you can best achieve happiness or 'fit in' with the rest of society. isolating one path to happiness and then invalidating it by saying its based on character flaws is just ridiculous.