When I was (very) young a some neighbours of ours were strict Christians, and I mean STRICT. They would not allow alcohol in the house. At the age of 14 their youngest son was an alcoholic.
One of the other influences was my parents, they both tied one on quite regularly. I remember one Christmas (I was 14) when my mother was so proud of herself for managing to cook Christmas lunch while she was drunk (they started drinking at 9 in the morning at Christmas!!!!). Needless to say she did not cook Christmas lunch, I did, and my brother always said I was lying when I told them I cooked it (that is another story though), so she always believed she managed it.
Due to that experience I allowed my kids watered down wine with Sunday lunch from about 10 or 11, they were allowed to drink properly, within limitations, from about the age of 16. Consequently, when they were of legal drinking age they knew what effect alcohol had and knew when to stop. Yes, they had good sessions when they were early 20s, but that lasted a couple of years, now my daughter barely drinks at all and my son has a few beers of a weekend.
I hardly drink at all, a glass of wine with Sunday lunch ands that is it.
I still think it is best for "kids" to experience drink in a controlled environment rather than their first experience being going out on the lash with mates and ending up lying in the middle of the road somewhere.