For any diet, if you go back to eating exactly how you did before, you'll end up the same weight you were before - that's how we all got there. It doesn't matter which diet you lost it on.
Personally low-carb is the only way I can lose weight. In the past I've gone 8 weeks on 1000 cals a day and not lost an ounce. So I've concluded I will probably have to restrict carbs for life if I want to be healthy. But that will still allow me to live "normally", healthily and to have some treats.
But your body may be more tolerant of carbs. Plenty of people do Atkins and then maintain on quite a high carb level. Once you get to goal you need to find the right way of eating to maintain your weight and that's bound to be different to how you ate before and will probably be different to how some people around you eat. Everyone has a different metabolism. I figure I'll worry about that when I get near goal, for now I'm going to focus on losing.