I just wrapped up a series of weight loss and health enhancement seminars in Florida, and during that seminar I spoke about how I personally break up carbohydrates when working with my personal clients to create a diet thats going to help them lose weight and develop a tight body.
Now obviously, theres technically only one form of macro-nutrients known as carbohydrates, and in that category we can break it down into 2 sub-categories known as simple and complex carbohydrates, but when thinking about developing ultimate health, fast fat-loss, or maximizing your metabolism - theres really a much better way to think about carbohydrates.
Classification 1: Vegetables. This is the class of carbohydrates you should strive to choose from at all times, meaning that you really should have a serving of fresh, preferably raw, vegetables in almost every meal of the day.
Classification 2: Moderately processed carbohydrates like brown rice, whole grain pastas or breads, or other all-natural (organic) products. This class of carbohydrates could be added every once in awhile, assuming that the rest of your diet has been going pretty well so far - but add these sparingly to your diet because they come with none of the real health or weight loss benefits that the carbohydrates in Class 1 have.
Classification 3: Heavily processed carbohydrates like white bread, sugar products, cookies, cakes, etc - better known as junk food. This category of carbohydrates is the category to avoid if your goal is to lose weight and develop a tight, lean body without dieting too strictly.