Smoked intermittently around 15 or 16, then a bit in college. Stopped after that, and other than occasionally bumming a cig in a bar or something, I haven't smoked since. My dad's last vice is smoking, and I've got the kids working on him to quit [img]smile.gif[/img]
Drinking... started around 16 or 17, picked up steam in college, and then petered out. I still drink, but rarely. I have been drunk, but never enough to get a hangover.
Part of the reason I stopped drinking so much was that I never reached my limit of drinking. And it wasn't for lack of trying to find out where it was, either.
It's just that after drinking to the point where rum tastes like water and you've already out-drunk everyone else, what is there to shoot for?