Definitely good health is the top priority, but other than that:
-I want to walk around proud of the way I look, with some strut in my step
-I want to be able to fit comfortable in restaurant booths without moving the tables...if they aren't bolted to the ground
-I want to be able to fit in an airplane seat without having to get the seat belt extension
-I want to be able to shop in the skinny girl clothing stores
-I want to be able to wear a bathing suit and not worry about anyone looking at me funny
-I want to be able to eat to live, not live to eat
-I want to eventually wake up in the morning with nothing but going for a morning jog/run on the brain
-I want to look the best I have ever looked in my adult life.
There are many other reasons, but I will go with these for now.