Dieting - Which is better? - Go Vegan, Atkins or South Beach

Tweet

I come from a family who loves to eat as a past time so that most of us are obese. It's quite alright when you're still young but when u age all the aches & illnesses come. We're prone to heart ailments, diabetes, etc. So am determined now to go on diet. I've tried dieting before, problem is after a few months i gain weight again. I live a sedentary life, i work nights and sleep days. So can't do much exercise. Has anyone tried these diets? Which would u recommend for aged people like me? The vegetarian, the atkins low carb diet or the south beach diet?