I feel that about the alcohol. While I have been drunk exactly two times in my 51 year existence, both times as a teenager, I simply have no use for booze, and like you, it's only because I just don't like it. I come from a family with several alcoholics, and the "legal to drink" age (19 years here) was almost a bigger milestone than "legal to drive" and "legal to vote". It was a disappointment to my older brother that I just didn't care. People have always tried to get me to drink by saying "You can't even taste the alcohol in it", to which I'd reply "Then why put it in there to begin with?"
I also don't smoke weed (even though it's legal in Canada) or do any other drugs. I've tried weed but don't like being stoned. I hate not being in control of my own head.