I'm almost in the same boat. Borderline a non-smoker, only occasionally enjoying pipe tobacco cigars. If I had to break down my smoking habit, I'd say I probably smoked an average of a pack every other month, if that. Every now and then I'd smoke a pack in a day (4-6 sticks in a pack, mind you), but something unusual would have to have happened for me to do so.
As far a chemical substances go, I've never been addicted to anything, and doubt I ever will be, so I'm not too concerned with that aspect. I generally just find vaping to be enjoyable, and actually have dabbled in some 0 nic bottles just to enjoy the flavors. Not that I don't enjoy a little nicotine buzz, as I do primarily stay around the 6mg range. I've got a bottle of 12mg, but if I hit it it's for a purpose.