You guys are awesome-- thanks SO much for your incredibly helpful feedback!
Kim, that's a great tip about the posterizing (I found a filter called "poster edges" which I'm assuming is the same thing).
Ernest, you're so right about the lumpy irises! I think I've improved upon them now, but here's something I wanted to ask for clarification with: on the viewing right, there's a sort of secondary highlight in the bottom right corner of the eye that lightens not just the eyeball, but also the iris. I'm wondering if that comes across correctly, or if it's contributing to the lumpy appearance by seeming like a flaw in the shape of the iris...?
Also, what exactly is a circle gauge and how is it different from a compass? My google search just brings up a tool related to wheel bolts, but I'm guessing it allows you to draw a circle that's not flat (like a compass would) but rotates the axis so the circle is rendered correctly as it would be seen at an angle...?
Now, to tackle this hair problem...
Thanks again so much; I really appreciate your time
Monique