#17. Really like this one. I can't get past my absolute first impression that the eyes are wings. Once I take that quick second look, the picture clarifies. I like it.
#15. Like this one also. I like the separation.
#16. I'm afraid the font has a too much detail and it would get lot in small images.
Great work. Thank you. I would love to see if you have some other thoughts or variations. Maybe add a little silver as opposed to just black/white. Would love to figure out how to get the eyes from looking so much like wings on first impression.