I'm still far from finished losing weight but I've found that the simplest things are often the best. Calorie counting is really working for me, along with eating a more healthy diet. For me that means limiting sugars and eating complex carbohydrates. I have also increased my protein intake and the amount of vegetables I eat. In terms of volume, I'm eating more now that I ever did!
It also helped when I worked out just how many calories I was supposed to eat for my height and weight

. None of that 1200 for everyone nonsense! I never lost before because I was eating too little. I was quite miserable because I though I was doing everything right and didn't get any results.
Exercise is also very important for me. Before my weightloss started I'd never been inside of a gym. Lessons with a trainer helped me a great deal! I'm now doing careful cardio and weight lifting, so I don't aggravate my medical issues. The initial insecurities and feeling like a duck out of water were quickly dispelled.
As everyone said, in the end what diet works is very individual. You seem to have had good success, so you must be doing something right.
MN.