As Proko showed in the demo, this can be dealt with in the initial lay-in, and by walking away for a few minutes, then sitting back down. You will know what needs fixing instantly. This, and practice. The tones look pretty good tho. Even so, this looks cubist!

@great399 I am no master at hatching, and its been a few years since I've drawing regularly. But IMO I think you made a very good go of this. Nice! When I learned to hatch, I found that always having one set of lines going in the direction of the form (ie: highlighting its roundness - the striped sock effect) is very important. For the "base tone" it is best to choose the direction of the form. In some cases, the skin (as here) has crinkles **maybe** keep the hatches going in that direction can be good too. But usually, going with the form is best. The second and third layers of hatches I found to be best just a few degrees rotated from the base layer. When I hatch at larger angles (ie: approaching 90 degrees) it does not seem to work for skin tone. So, these additional hatches should be off by a few degrees but still reinforcing the form. This makes it similar looking to an etching. There are other formulas too. Such as the base shadow layer always goes parallel to the light source direction and additional the layers on top can describe the form. One "criticism" of your hatching is that in many areas your crossing lines are at too great an angle. Also, varying the lines (darkness, taper, width) of one set of hatches vs the next overlapping layer is also a good idea, but to do that consistently. When I doodle, I sometimes fill in a page of hatched areas, it keeps me somewhat in practice. I draw a small random surrounding shape and then try to sculpt it with hatching. You can get ideas for random shapes by mushing up your kneaded eraser and drawing that as an outline and then the shadows of the bumps. The photo you have has a special case that you could try: the facial expression radiates from the midpoint of the brow - all of your hatching could follow that star-like set of projected lines, reinforcing the expression rather than the traditional volume or the shadow direction. It may not look "correct" but it could have a nice stylized character to it. Hatching is hard. But, look at what great comic book artists do, there are a ton of great examples. Leonardo da Vinci did it differently.

I love it. So much character. Not a critique btw.