In most games, when there's an option to play as a man or as a woman, I generally choose to play as a dude because...I'm a dude. I guess it helps to immerse myself in the game but I never really gave it much thought beyond that. But in my second playthrough, if it's something like an RPG or anything like that, I usually switch to a girl just to see different story paths, conversations, personality even.
Except for fighting games. I've been telling myself it's because I love fast, rushdown characters like Millia Rage or Cammy. I even managed to fool myself into thinking it was because I used to do the martial art they're representing, like Lidia Sobieska from Tekken. Which is technically true, they have to have a play style I like.
But along comes Granblue and I'm torn between two characters: the badass old man brawler that is Soriz and zoner archer lady Metera. And at this point, I can't lie to myself anymore and will probably play Metera because she's a woman and she's hot.
TL;DR: I like women and they're hot.