These are all so beautiful! And realistic too, just amazing!!
If I had to pick one, i'd say i'm favorite would be the Sagittarius eye!
I love that cerulean/saphire you used for the Pisces! (I am a Pisces. Hehe.)
And to be frank I thought these were people wearing contacts, I never expected this to be drawn till I read the description. Derp. (You got skill!!!)