I started because I was fed up of being overweight and it was also a New Years resolution. I am not sure what made me stick to it as I've never had willpower like this before. But I was fed up of giving up over ad over again. Not just diets, running, hobbies.
So this year I've gone from obese to healthy. I can do a half marathon. I've made myself learn keyboard. I feel like a new person.
I chose weight watchers because it is easy. The reason it is easy is because I can track everything on my iPhone. I think without the app I would have failed.