Well Let Me See ....Heels ... wearing high heels, I can have a sleeker looking figure, add some height, as well as some style and class. It also shows a more confidence, and men seem to have taken a liking to them (not a bad reason). Overall, heels just look nicer and make me look better and more feminine.
Hose ... at time to keep warm but all in all they make my legs look smoother and more shapely.
Panties ... sometimes we are wet down there all the time we don't want that on our clothes. But also wearing jeans without them is quite uncomfortable. Putting it bluntly, it's so that my butt crack doesn't show through my pants.
Just my thoughts.