You forgot to list cigarettes. I think thats really one of the worst things. At least for me it is!
Well, YAY, i am nicotine free for 20 months now. Thats the longest time since i started smoking at 14 - and I hope i dont fall off the wagon again. But yes, i am still (and will always be) addicted to nicotine/cigarettes. So stupd really (smells bad, doesnt give you a real benefit, costs lots of money, harms your health... etc etc). For me definitely the drug that was hardest to quit....