All the kinds of diets you mentioned has its own meaning.
 

I agree with the diets mentions above every diet having its own specialty.
-Drink water daily.
-Ban white bread and pasta.
-Drink coffee an hour before working out.
-Eat Salmon for Lunch.
Dietary Approaches to Stop Hypertension or DASH diet is a complete healthy plan, with twenty eight days of meal plans, over forty five recipes, and the complete lifestyle plan to lose weight, lower blood pressure, lower cholesterol and triglycerides, and become healthier.

1. Atkins diet
It`s very good diet I read and heard, some friend use this diet and have good result but they mix with hcg drops

I agree too about SB diet, I have also lost 10 pound.

Atkins Diet is Best
 

Atkins Diet is the prefect Diet plan to reduce Weight, because this contains low carbohydrates. Try to engage with this diet plan as long as you can. If you really want to lose body weight or want to stay fit.

the diets are vary by the individuals to individuals according to me there is no such diet that can loose weight in the above mention diets

GI diet is much like the Atkins... but it measures the Glycemic Index as to how fast your body will elevate your blood sugar level... it seems to be about Carbs and which carbs are best as far as keeping your Blood sugar down...

that is a loaded question LOL. The best diets are personalized....and registered dietitians and physicians will know what is best.

Your view is good but there is some general diets which apply to all individuals.

Atkins low carb diet program uses a powerful life-time approach to successful weight loss. Studies show that low-carb diets are as effective for weight loss as traditional approaches and can improve cholesterol and triglycerides.

I think Atkins diet works out pretty well.