I only drink socially, but even then I only drink a limited amount (normally 4 glasses of wine or 3 pints.) In the past when I have gone all out (mostly to keep up with my friends) I noticed I don't get drunk, I tend to become very tired and get a massive headache that cripples me from enjoying myself.
Yeah I know, I sound like a bag of fun
I think it's partially because I grew up with people that can't do anything social without involving heavy amounts of alcohol. I've also witnessed these people lose control on countless occasions and hurt themselves and others because of it. It's caused myself and so many people I know problems, so yeah I'm not a fan of alcohol. I'm especially not a fan of this country's obsession with getting plastered in order to have a good time, it's possible to have a great time without losing yourself in a sickening drink filled haze.