I can tell you this much. I first got sober in 1973. I was 27. I remained sober until 1975. My girlfriend at the time was a druggie and her drug of choice at the time was valium. She left them on the coffee table, and that pissed me off. I looked at her, grabbed what was on the table and swallowed it. 20 minutes later I was on my way to the liquor store. Before the night was over, I had kicked in a door, got into 2 fights, and got beat up by the LAPD (which I richly deserved, btw). I then stayed sober and drug free for the next 30 years, thanks to AA.
I began drinking earlier this year (2007) and so far, it's under control. In fact, it's a PITA. A little buzz and I feel like *expletive deleted*it the next day. No addiction, no desire to continue. I can take it or leave it, BUT, the fact remains that I am most assuredly an addictive personality. I can get hooked on nearly anything. Is that alcoholism? Who knows? But I can say that an affiliation with AA and adherence to their principles can only have a positive outcome.
God Bless You!