I tried the atkins diet about a year ago. I lost about 20lbs in a month. But I couldn't take it. I still get sick to my stomach when I see a bag of pork skins. I love cheese, eggs, meat, broccoli (which is pretty much all I ate)...but I craved sandwiches, spaghetti, coke, coffee. I was quickly fed up with the likes of splenda and diet rite and decaf . I do believe that much of what has been said on here about the healthiness of this diet is true. You have to wonder about a diet that encourages the intake of fatty foods and denies vegetables and fruits. The whole goal with this diet is to send your body into ketosis which is an abnormal increase of ketone bodies in the blood as in diabetes mellitus. Atkins works if you want to lose the weight, but I do believe it to be unhealthy.
Francois was right. Out of all the diets I have ever been on (and I've been on many) the low-fat diet was the best!! If for no other reason than it allows you some variety. You can eat as much and as many vegetables you want. There is now an abundance of low fat foods on the market like chips (like wow brand and baked varieties), cookies, and ice cream to choose from, not to mention all the fruit you can eat. You can have bread, pasta, sugar...actually the only thing you really need to steer clear of are things like butter (which I used low-fat butter or something like molly mcbutter), oils, and fatty meats. I ate lean meats (chicken, turkey) and became addicted to turkey bacon. You can still drink normal caffeinated, sugary, creamy (powder, of course) coffee. You can drink tea and coke and...why did I ever go off of this diet? Like Frank said, you keep the intake below 30 g a day. It's pretty simple. I exercised a minimum of 30 mins a day, 4 days a week. I lost 50 lbs in 4-5 months. I kept it off for about 6 years.
Stay clear of the cabbage soup diet (yuck). I have heard good things about weight watchers, too. Also, my husband went on slimfast (so did I, but with no luck) and he lost about 20 lbs over a 6 month period. It was slow but he has kept it off for several years now.
Good luck finding what works for you!!!
Sadie