I'd addicted to all types of energy drinks, whether it be Rockstars, Amps, Coffee, Yerba Mate or Mt. Dew, I have to have at least one of those things each day.
For the last year or so, I've been having to go out to my dad's house to take care of him, and each time I'm there I'll smoke a few of his cigarettes. Well earlier this week, I bought my own pack.....frick.
Those aren't the strangest of addictions though, they are pretty common.