I'm going to list some different "diet systems" that are based on nutritional factors (directly or indirectly). So not things like Jenny Craig and Weight Watchers. I have included a short summary (please note most diets have more to them than what I note) of each diet. Please note for each diet your opinion of them and if you would follow them (for whatever reason).

EDIT: I'm asking your opinion of these not based on a "weight-loss system" factor, but a "nutrient control" system meant to prevent not only obesity, but heart disease, Alzheimer's, kidney problems, diabetes and other "disease of civilization",

1. Atkins Diet (minimal carbs, no starch, high meat protein)

2. Vegetarian (mostly fruits/vegetables, sometimes dairy and eggs)

3. Vegan (absolutely no animal products)

4. Mediterranean Diet (high plant consumption, fruit desserts, olive oil for fat,cheese and yogurt,white meat, eggs, low red meat, wine)

5. Paleolithic Diet (no potatoes, grains, dairy or beans, encouraged lean meat consumption, most plants, mostly water/tea as beverage)

6. Raw Food Diet (mostly like Paleolithic diet, but NO COOKING ALLOWED)

I'm sure I'm missing some, but these are some of the more common/more noisy diets out there. They're at least the only ones I care to ask your opinion on at the moment

My personal opinion, is that all of them except the Raw Food Diet have their merits and for the most part are all based on reasonable nutrition. I just read some articles on the Paleolithic Diet and of these, I think it would be the one I followed. I just like potatoes too much. And feta. And Ice cream. But besides that, I really good do it. The bean thing sounds out-of-the-blue, but if you research the thought behind it, it does make sense.