@KoiwiGal - I think it can do wonders for your self esteem though, wearing high heels and you can always take the precautions of walking around in flats as well.
My mother has worn high heels all her life and she's never had any trouble with her feet, while I've got an aunt who never wears heels and she always has sore feet.
I think it's got a lot to do with your weight and nutrition as well. After all, your feet are having to carry all of your weight all the time and if you weight a lot for the size of your feet it's inevitable that they will eventually become stiff and sore. Feet are pretty resilient though and I think most people won't have any trouble with them.