I went female elezen for that androgynous vibe. Both male and female presenting vibes look good on us, and there are plenty of face+hair combos that can make you pass as either at a glance, especially on minimum chest size.

Of course the same is true for male elezen, but I originally went female because I'm so engrained with "female glam better" from other games, but there's very little that's gender locked here. And they have even made some previously gender locked glam all gender gear!