12 years for me after having smoked for 20+. One time, I was super stressed out and just felt like I needed that cigarette to calm down, so I walked over to the corner store and asked for a single cigarette. When I lit it up it tasted like SHIT and I can't tell you how thankful I was.

Congrats on kicking it! Personally I feel like if I did try even one, I’d probably be back to smoking regularly. I had quit once before for a couple years and had “just one” and I was back up to 2 packs a day within a few months.