I don't agree about diets coming to an end.
I started my "diet" in October 2010 - I was 12 stone 5 post pregnancy, not attractive as I'm 5 4. I changed the way I eat and not just the quantities.
Its a diet for life, its healthy and its sustainable. I hate the idea of any diet which advocates the use of "diet foods". Whilst I do eat low fat dairy etc I would never touch any processed diet product (thinking weightwatchers). If I want a kitkat I eat it, just not every day.