Used to smoke an occasional cig when I was frustrated (a pack of Rothmans could last a month with me), but I never made a big habit of it. I used to have a cigar here and there, too.
However, I realized it was stupid, I hated the way I (and others) smelled, so I haven't had a thing in over 5 years. And I shall never smoke again.
A good friend of mine smokes, luckily it's always outdoors. I always tell him to quit...it doesn't work.
I once had a girlfriend once whom smoked. I realized I wasn't brushing my teeth as much before a date with her. Things changed...
One day, I walked out of my favorite record store, and a punk told me I'm a sellout for buying the music I did (it was Stone Temple Pilots, BTW). But he was smoking a Marlboro Red...I told him, "I may be a sellout, but I'm not selling out my body to a corporation like a whore!"