I used to be a smoker and it's genuinely true that for the most part, they don't know how awful it smells. Or how much that smell carries around with you. It disgusts me to think I used to smell like that, and when I used to get cravings when I was giving up, it was the thought of stinking like that again that actually stopped me from lighting up.
It's like most other things in life though, if you don't like something, you won't like the way it smells. I hate gin and the smell makes me feel queasy, as does brandy, but the smell of a good whisky has me drooling. Each to their own!