Some of my recent charcoals... hope yall like

These are all pretty damn good. But for gods sakes boy, invest in a scanner.

Those are great Pudge, you have some good techniques. My only suggestions would be to loosen up some and maybe work on your porportions a little. Keep with it.

That, and really try to provide the whole range of tones. UNLESS, and I think this might be the case, you're intentionally sticking with high or low key values. The last pic for example, looks washed out like a photo too close to the flash bulb. Make sure you reserve the white/blank areas for the extreme highlights, and the blacks for deepest darks, and keep a consistent pace between the two as you shade.

Sometimes it helps (in school they do this, maybe it helps but I haven't really done it since) making a sort of b/w value scale key/legend of three to five tones (I think there are 9 total if we're being academic and if you had that kind of control) and map them out on the pic, choosing what would work best. For example, just below midtone would be high dark, and you'd say "what's the first major part where it starts to get dark?" and sketch in those areas.

The reason I call it a map is if you do it mechanically this way you're going to be blending and adding and overlapping tones, etc. anyway so it's really just laying down the building blocks of tone.