For me, the best that I have tried is Paleo. And I DID NOT worry about 'counting calories.' Been with it for the last several years now. Not only did it help me lose weight, but actually feel great! My love for it inspired me to write a book because it inspired me to share the greatness I have found in Paleo. Perhaps you can too. Just remember to eat the foods appropriate in Paleo! There are a lot of recipes available and you can eat deliciously without feeling the guilt!