After four months sober, I'm down almost 20 lbs. Some of this is due to cutting the empty alcohol calories, and obviously now that my late-night judgment isn't impaired, far less junk makes it into my mouth. For the most part I've cut carbs, and after an initial sugar fix, I've also backed off the sweet stuff.
With fewer body aches, I'm walking/jogging over 20 miles a week. And like ChloeRose said, the way your facial appearance improves is pretty cool