If I could, I would change my nose and I guess my chin, but most of all, I'd make myself thin. I would be very happy as a size 6, instead of the size 8-9 that I currently am.
I'm not saying this just because I like you (because I do like you) but there is nothing wrong with Size 8 or Size 9.
Have you seen the Models in Paris Catwalks? They look so scary and thin! It's horrible. They look ill. Size 8 and above is very good and healthy.