That said, I'll usually always play a male character in a Souls title, because [insert valid reason for inconsistency here.]
I often do this when I want the character to mesh with the build. If I'm playing a character with a great shield and giant hammer, I'll want a big beefy character that is often easier to create in game as a male body. And when I play a quick assassin, I often pick female. It's like the opposite of how anime weapons work.
FYI: as someone I think would like incongruent in girl mode, I went as Dr Frankenfurter (creation scene, was cold) for Halloween this year and went all out: full makeup, fishnets, shaved legs, 4" platform heels, etc. It was very fun and could be a good entry into what you might want to do. Also: you can always dress up at home just for yourself.
Bayonetta is my only exception for this. Because she's got guns in them heels. Also because her character clearly wants them.