I think for the most part everyone tries to look the best they can, which can mean extreme femminity at times
However. As has been said toning it down and blending in is more realistic to how women are in everyday life. The difficulty for most is keeping it toned down, while still projecting there female persona ( be they CD or TS ) as they dont want their male side showing.
Also we are all individuals and for some the few opportunities to express themselves means that they go for the most glamourous look they can.