Chocolate is a natural grown plant producing the cacao bean. Eating chocolate has many advantages such as low amounts of caffeine per cup of hot chocolate compared to a cup of coffee. It also has large amount of antioxidants, is good for blood flow and has a soothing effect upon a person's mood. en.wikipedia.org
I'm not sure there are ten bad things other than the amount of consumption which would relate to the following:
- Fat content from added sugar and milk
- Calories related to the amount consumed - an average chocolate bar has 270 calories and 17 grams of fat. www.positivehealthsteps.com
- Eating chocolate because it tastes good instead of other foods necessary for good nutrition
- Accumulated caffeine from consuming too much chocolate