During my teen years , I used to have many addictions (smoking cigs/cigars/weed , occasional coke, soda, cutting myself, etc) and quitting cigarettes was by far the hardest one to quit, all the other ones I quite cold turkey quite easily but cigs were different , they have a certain quality that just gave me a calm euphoria that I could not get anywhere else (besides cutting, but I had to give it up after it became too obvious).