I won't miss shopping at plus size stores, paying twice as much for clothes that are half as nice as "regular" sized clothes.
I won't miss people telling me that obviously the "you look like your dog" thing isn't true in my case (I own a greyhound).
I won't miss being the "fat friend".
I won't miss people amused stares/questions when they see me eating healthy food. (What!? Are those carrots!? YOU EAT VEGETABLES?)
I won't miss people telling me how to lose weight and what worked for them.