Iris size

Large on fem Au Ra, large or small on fem Miqo'te depending on the overall look I end up going for, and small on Viera and Miqo boys.

Large! For all races, all the time.

I've played around with other races, and it seems I prefer small iris every time.

large on Roe and Viera, small on Hroth

You WILL look into my soulless eyes!

To me it looks like the difference actually applies either to the pupil or iris depending on the race so it varies. I used small for my miqote and lalafell but large for my elezen.

It depends on the race and face.
I think I have the small iris on my female Au Ra. I just use the one I like more, depending on the other options.

I tend to use large irises for female characters, and small for male characters. I think it might be a symptom of watching cartoons where the female characters typically have larger eyes, compared to male characters.

Large.. I picked small and it makes the character look crazy. Try doing that on a midlander and you'll see what I mean. So large all the way.

Large.
I feel the small iris give people psycho looks, mainly the females. Looks fine on guys.