I grew up around smokers. My dad smoked for maybe 35 or so years b/f he had several heartattacks and a quapdruple bypass. Even THAT couldn't get him to kick the habit. It was only when his doctor told him he'd be dead b/f he was 50 if he didn't quit...(he was 46 at the time). And believe me, he was smoking a carton or two a week!
He's gone w/o smoking for 11 years now, and to this day he says its his proudest accomplishment. It was only after he quit that I realized how bad our house/clothes/etc has probably smelled.
My grandparents (both sets) smoke HEAVILY, and it's too much to bare anymore. I rarely go visit them b/c their house smells so bad and you just come home itching to jump in the shower.
That's not to say I'm offended by smokers. Many of my office mates smoke right outside my door. It's no big deal, but in the summertime they come in with a tainted smell on their clothing/hair that is pretty gross.
Myself, I have a cigar every once in a while. And not the little piss-ant varieties either. I take on the big ones. It's usually more of a ceremoneous occasion. My best friends and I will have a cigar on the balcony of my apartment. Or we used to go out to a duck pond near the park in college.
It started as a way to bond with the guys; relax and have some "man time". And it still is, my friend (cheaply) goes for the sissy black & milds with a sippy cup on the end, while I'm developing a real taste with expensive varieties from around the world.
But like I said before, I might go two months without one and all of a sudden have three in one weekend.