So, per Groucho's suggestion, I added some materials to the eyeballs, and after I hit F12, my jaw hit the floor. He was a real boy! Or real grizzled old pilot, as the case may be. After some eyeball fiddling, I added a new material to the lips with a dash more saturation to get them to stand out a bit more, then hit the subdivide button and went to town with some more sculpting.
More detail in the facial wrinkles, a little definition in the forehead, crows feet, and some serious sinew in those neck muscles. I also carved up the ears a little bit.
Things I have learned:
1) If you are going to use the crease brush, and then the pinch brush, the pinch brush should be a little bit bigger than the crease brush for better results.
2) It may not be totally anatomically accurate, but those neck muscles were fun to sculpt and really give an attitude to the bust.
Going to have to kick it up another level to detail the lips, I think.
