I don't think I had a single moment. My weight has always been a problem. In fact everything in my life is ace right now except for that and it has been that way for awhile. I am college educated, a homeowner, married to the woman of my dreams and the only thing that isn't awesome is my weight.
This year I had two uncles who are both diabetics go on dialysis. And I started working as an RN in a dialysis center and it was really eye opening and I finally made the connection between poor self-care, morbid obesity, diabetes, and kidney failure. I do not want to be in that situation. Ever.
So this time it is motivated by health and not vanity and maybe that is the difference.