Personally mine is a health thing - my dad's side of my family has a history of dying early from heart problems and on my mum's side there is a tendancy to have early strokes and end up disabled for years and years. My goal is to walk in to my doctor's surgery and him say 'you are the right weight for your height'.
Of course looking nice would be a great side benefit as well - as would being able to walk in to any clothes shop and find clothes to fit me.





!), but when my dad got diagnosed with diabetes it scared the bejesus out of me and was just the kick up the backside I needed.
(Well I can dream can't I
)
