I have zero motivation and willpower. Definitely not a yoyo dieter. More like a never-dieted. But I now MUST lose two stone. I want some motivation. What's different in your life?
I want to be able to do plough pose in yoga without suffocating on my own fat. 
I want my asthma to improve.
I really really want more energy.
Also - what plan did you use and how are you keeping the weight off?