Why do ♀ Keepers have no darkened nostrils?

[lolicon09]

Doesn't matter. we Keepers have fangs and better eyes.

[HeyMcFly]

Nostrils?? Does anyone actually look at their characters' face that closely after they're done with the creation screens?

When you're creating your character, I'd imagine most (not all) tend to pay attention to their characters face since it's you know, apart of character customization. That's why the pictures are of the character in the CC screen.
Outside of CC? I don't know, because players sure as heck don't pay attention to their fashion either- Unique characters existing in FFXIV seems to only be an NPC thing. Almost all miqo'te I've seen choose one specific look anyways, as most are seekers.
For myself, I actually try to like my character, so the answer is Yes. I do pay close attention to certain details.