Yes, I am a kind of Star Wars' geek, however I think there is a real sense of fashion in those costumes.
For me, Padmé Amidala is the one who shows the best closet. Her closet follows her lifetime, since her childhood till her mature years and grows with her and with her importance on the Senate.
Still a young queen
The seriousness of a queen
White for peace in the Republic Empire
Seducing a young boy
Pregnant of his children
(Padmé's costumes by Trisha Biggar)
My fav one? The lace wedding dress! It seems the one I am always dreaming of!
(Leia's costumes by John Mollo)