Never been a big drinker, although late teens/early 20s was out each weekend drinking and getting merry, not stupid drinking like these young filk do these days and get completely cream crackered. Although around 23/24 I started to get very violently ill from drinking, just a couple of pints would be enough to make me sick all night long, physically vommiting every hour or so, so I just stopped drinking and haven't missed any of it. Although these days I do have the odd pint, very very rarely though and could count on one hand what ive had in the last decade.
Don't smoke either, used to until a few months before our first born arrived in 2006, quite a heavy smoker too going through around 25-30 a day, but for a long while I just got sick and tired of smoking and out a 20 pack i'd perhaps only really enjoy 3 or 4, so on Good Friday I had my last ciggie and never looked back. Giving up isn't as hard as people make out either, you just have to want to do it, although my main motivation was I wanted to quit before my son was born and before I turned 30, both achieved!! These days though i'm the worst ex-smoker, really despise the things and cant stand to be anywhere near people smoking, even someone who's just had a fag makes me feel sick, the smell is horrendous!