This post has been idle for 2 months, but its a good one!
12: Alcohol, not a huge fan.
13: Cigarettes, not a fan.
15: Pot
16: Sex, and I am still addicted =)
18: Ecstasy, Hash, Mushrooms, Salvia (felt drunk for a bit, and then was done), Compressed Kief, Various mixtures of THC and...