Incredible! I envy you!
The detail and preciseness of this peice is astounding, which suggests to me that you are extremely talented at analysing your subject. And this is, as i'm sure you know, one of the key skills required in multiple proffessional art fields.
This is a skill, among others, that i sadly havn't aquired, and probably never will.
I could go on, but this would only further express my jeaously of your fabulous talents and techniques.
Z-K-Zach said that the wrinkles are "too deep and thin", but i personally think this, along with his expression, helps to express the gritty reality of being a Doctor. Whether this was intentional or not, i don't know, but i'm astounded.
I'll definately be looking out for further works from you!