I had my last cigarette 11 yrs ago...

I smoked heavy for well over 2 yrs. I only smoked Djarums.
1 to 2 packs a day everyday.

One day I just stopped. I don't even know why I stopped I just did.
Maybe I had several reasons to and I can't pin point one.
I know family and friends would comment on the smell and on several occasions I though about my health so I'm certain it was a mixture of a couple things.

Good luck.