Weekly Update

I've been working on the Rose Reiner mostly, here's where he's at right now:

This is the part where I tend to get stuck. I'm never sure how to proceed from here. Do I want to keep adding hair detail? Do I use dry pigment to soften it up a little and then add more hair detail? I think it needs a little more work but it's so hard to know what to do. I've put so many hours into it that I dread screwing it up by going too far, and then having to backtrack for several more hours.
I have some time before I determine how to proceed as I work on the other side. I'm starting to procrastinate because I don't know what to do.