I must say that I despise them and when I'm forced to breathe second hand smoke.

I tried cigarettes as a teen for maybe one week. Then I developed bronchitis and said to myself "Why in the hell would I continue this utter nonsense!" I never smoked another again.

The above doesn't mean that I never abused a substance, though. I did have quite a period of alcohol abuse. I even had to detox from it inpatient.