I picked a weight that I was comfortable at in my early 20s (even though I always wanted to lose a little -- young women are nuts that way), but was still 13 pounds more than my thinnest weight ever as an adult (which I hit after obsessive low-fat dieting and marathon-type exercise in my late 20s). My goal weight now is 14 pounds under the "overweight" level for my height, which is a bit strict as I am big-framed. I am not wed to my "goal weight" -- I may never get there, or I may surpass it -- but I will take that as it comes. I want to look good, feel good, be energetic, and be able to do athletic stuff with ease (I ski every day in the winter -- extra weight really impacts that!!! This year will be MUCH easier than last year!).