I had been over-weight for many years, not obese but slowly moved up clothes sizes. I was sick early last year; had no appetite, found it hard to eat and generally despondent. My weight dropped from 94 kg to 72 kg over about 10 weeks.
Treatment worked, though I found it hard to regain my appetite for any food. So I started looking harder at food and decided to be selective and do things that were tasty. Previously I could not eat anything with much chilli or anything really spicy, so I forced myself to eat serves of Thai and Indian food the way they are meant to be eaten; small serves, with all the right accessories. I still drink too much coffee, but now it is black, and my alcohol intake is only high when I go to the footy. I cook more, which makes Mrs Fox the Third happy, although as she is gluten intolerant, I have to be creative which gives me a headache.
Anyway at over 60, my weight is stable at 78 kgs, I feel good, I am walking a lot more and starting to think about a new Wife !! The only issue is that my clothes are too big and I hate clothes shopping.
I do not advocate getting sick to change your lifestyle, but perhaps a more serious look at food and diet and smaller serving is a great start.