The raw food diet is the most restrictive diet I know of. It consists of nothing but raw plant foods. If the only things you like to eat are fresh fruits, juices, nuts, seeds, salads, raw carrots and such, you’ll do just fine on this diet. Otherwise, it will probably drive you crazy.
Still, the raw food diet might be worth it if were significantly healthier than a slightly less restrictive diet, such as a vegan diet. Is it? No. For example, a recent study by Dutch researchers found that people who ate larger amounts of fruits and vegetables had a lower risk of heart disease regardless of whether the preponderance of those fruits and vegetables were raw or processed.