I quit 37 years ago, after smoking 4+ packs a day. I believe what saved me is that I didn't smoke American cigarettes with all of the chemical additives.
I never missed it because I went through a long process of getting myself ready to quit. By the time I did it, smoking was over and I wanted no part of it. I think it's harder to quit when you feel coerced in any way, by a doctor, spouse or whomever. When you decide on your own you're ready to quit, it's much easier. The smell of smoke itself doesn't bother me much, but I'm very aware of that terrible acrid smell of nicotine or whatever it is that lingers on smokers' bodies.