My mom and step dad smoked. I'm glad I was never interested. Turns out my maternal grandmother died of lung cancer. (I found her family a few years back, mom is adopted)
My sister smokes and I have a really hard time understanding. I know many people do it for weight control but I just don't see it. You could probably shoot heroin for weight control, right?
I never had any trouble with people smoking around me because of being exposed to it at my Mom's. It didn't "bother" me. But then I got asthma back as an adult and couldn't go to bars/night clubs and some restaurants because of the smoke. I'm glad it's not allowed inside public places in Ohio because of that. If it doesn't seem to affect you it's hard to realize that it actually makes it very difficult for some people to breathe if you are smoking around them. It's not about "liking" or "tolerating" other people, it's about being able to breathe.