Supersize me was the final straw in my inability to eat fast food. I understand how any food can become addictive. If you haven't seen the movie, watch it. Think about what is in the beef that is being used in fast food. If you saw what was in that meat you would never eat it again.
I am glad you are considering giving up fast food. John Candy is just one of millions of people that have died from eating poorly. Don't forget to add some type of exercise in the "new you" attitude. Take a picture of yourself in your skivies and put it in your wallet. Everytime you open your wallet for fast food, you will see what you are doing to your body. If nothing else, maybe you will fear someone else seeing your picture and not open your wallet!
Can't wait to hear how you are doing.