Never thought of this topic, but actually I do like a protagonist with killer fashion sense. So much not me, but naturally I always wished I had an unerring instinct for fashion, right?
So, this list is heavy on romances, but you know, you do get some SFF titles that draw on this kind of fashion-instinct for giggles, or, actually, sometimes not just for giggles.
An example of the former is Betsy The Vampire Queen by MaryJanice Davidson. That series is light, fun, charming, and is enhanced by Betsy’s obsession with killer shoes. Writing light, humorous stories is a gift and Davidson does it well.
But! You know another example that comes to mind? Nina Kiriki Hoffman’s A Fistful of Sky, a book I love — it’s my favorite by Hoffman, and WHAT a great title — with a wonderful take on magical curses. This is not a light, humorous fantasy in the Betsy style; it’s actually a serious story about family relationships. But it has plenty of comedy in it. All the curses are clever and fun, and one involves being cursed with Killer Fashion Sense. Which is not entirely a curse, as long as you can turn it off, see.
Anyway, fun list, but I’m sure there are tons more SFF examples as well as examples from romance. Anybody got another?