Interesting post and some great replies, mine started in my late teens I never drank until 19-20 when a beer seemed like the most horrible taste I could imagine but sadly it was seen as being cool having a beer in hand and all that.
As time went on I started going to the local bars and the gradual decline into occasional at home drinking became a daily event in my life, my side of the family have always been and still are heavy drinkers and my wife's side never or very rarely drink at all, so I finally quit cold turkey at 37 which is my only ever attempt to do so and still going strong at 7 months with very little in the way of cravings thankfully.
Great thread.