I quit smoking last March. I smoked for over 24 years, starting around puberty.
From age 14 or so until my first desk job @ 25 I weighed 135lb (I'm 6'2").
Within a couple years I hit 240. Got laid off and went back to (trade) school. Lost 35 lbs. The only change was not sitting at a desk all day. Still ate out 3 meals/day and drank as much as I could afford.
I'm now back up around 250. I decided yesterday (before seeing this thread) that I wasn't going to buy bigger work pants. And I clearly need to.
Before I quit smoking, I ate very healthily. Big breakfast, 2 snack breaks during the day. Small lunch and vegetarian dinner. Weekends I had sushi at least 1 meal, and ate in most other meals.
As soon as I quit smoking, I started sleeping later, so no time for breakfast. I just grab a protein bar and juice on the way in to work. Lunch is a 6" Subway sub (on wheat, at least), 2 cookies and a medium unsweetened iced tea. Dinner turned into a Quizno's sub and cookie and medium soda or iced tea. Oh, and I raid the vending machine at work all day long.
Man. That was depressing just to type, nevermind really thinking about it.
Today, when I get home from work, I'm driving right by Quizno's to the garage, where my mtn bike has been collecting dust for 3 years. There's a large city park directly across the street from me.
Stay tuned...