When I smoked, I noticed more pain in my upper and lower back and degradation of my sense of smell and taste, something I used to rely on as I used to cook (and still do at home). Since I stopped smoking indefinitely and began vaping, my back pain has eased off (took a few weeks) and my sense of smell & taste began returning near immediately.
That said, I was never one to garner all the effects of smoking. The smell is inevitable, but in 10 years of smoking a pack a day, I never got the smokers cough, the winded feeling when running or walking etc. I got sick maybe once a year for 2-3 days max, but no major sickness in those 10 years (i.e. slight sore throat, maybe a 1-2 day cough, then I was over it in a week).
Smoking caused more progression of pain than anything and I'm not one to take pills or go to the doctor for something so minor, so I just dealt with the pain. I didn't want to swap on addiction for another, which is why I never took pills.
Fast-Forward, 10 years is behind me and now I vape. I run through about 2-4ml per day and I can breath much better, taste so much more (and use WAY less salt) and I feel much less lethargic.