There's just something in my head that says "NAY" to perfectly circular rings of shading (namely because the normal planes of a sphere will only ever have a circular intersection when viewed perpendicularly), but i suppose my head isn't always the most reliable source of information. :U
But let me illustrate why i'm confused about these spheres:



I'm thinking of the highlight as the reflection, however wrong that might be. In the above case, light is coming down vertically, which obviously produces a completely straight border between light and shadow. More diffuse light hits the eye from the more directly exposed top of the sphere, and right around the halfway between the top and equator, the specular reflection hits the eye on the right (also shown as a specular reflection hitting YOUR EYES RARGHARGHRGA). Now, here's why circular shading bothers me:



It'd look like that from this angle of approach, which strikes me as off. But now that i'm analyzing the ♥♥♥♥ out of this sphere, i noticed that i've been doing something that i KNOW to be wrong:



I forgot that the sphere curves in all directions for the highlights and core shadows. I suppose this does bring it closer to those neat circles that you're telling me about, so now i'm actually pretty convinced that you were right all along. Fancy that. :U

Also, in case it isn't obvious, i'm really grateful for your help, guys! If i were to find all this out by myself, it'd take like a million times longer than it has already. c:

Here's a thing

It looks like it wants to hurt me, yet it bares the medical cross.
I like it.

Scribbled this up out of boredom.

And this is why you should always mirror your work every now and then:

@Bomb: Lines are really scratchy, you could go over it in a new layer with smoother lines.

Mongol raider pestering a village.

Man, the definition you're able to put in with just some simple hatching is beautiful.

Thanks Alphagamer, glad you think so.

Every. ♥♥♥♥. Time. I feel your pain.

Glad i'm not the only one who gets caught unawares by that blasted mirroring thing. :U
That said though, that's quite a snazzy model there, maart3n!

Also madmax i totally agree with what alpha is saying, to my untrained eyes your art looks like goddamn pencil wizardry in its most glorious form. So that makes you a pencil wizard in my head, which is a pretty rad title. (and in case you're in doubt, this is a compliment)

@bombzero: I quite like those scribbles, actually. Might just be me being odd, but i have a soft spot for that sketchy kind of look. That, and you've managed to nail a drawing style that strikes me as nice (which i still have to actually concretely define for myself, but i s'pose pigeonholing is a bad thing). I don't really have anything insightful to add that hasn't been said already, so consider this to be a free ego boost.

also i just HAD to draw something so here's a 5-minute beaver rodent thingy

Fun fact: the different "Styles" I use are just created by how lazy or proactive I am feeling.
The "complete" process goes a little like this.
1. Rough construction.
2. Smoother construction.
3. Rough sketch.
4. Smoother sketch.
5. Yet smoother sketch.
6. Block coloring.
7. Detail coloring.
8. Shading.
8a. Light gradient shading.
8b. Light shadow shading.
8c. Heavier shadow shading.
8d. Light highlights.
8e. Heavier highlights.
♥♥♥♥. Screw this, I'm lazy, cel shading. (Insert prior to 8a if lazy)
9. Redo linework.

Earlier dragon is a product of 3,6,7,♥♥♥♥.

Personally I also like the 3,6,7,♥♥♥♥ look myself, but it often isn't to the taste of people who underwent traditional art schooling or take pride in small details and precision or are just really, really highly practiced and talented(looking at you madmax).

On the contrary, some of favorite artists are sketch artists who usually create very loose, basic sketches, I really don't care so much for a whole lot of tedious polish and refinement in my art, I much prefer the spontaneous energetic flow of the sketch, which is often lost in the finished piece, however, such sketches usually have very crisp and controlled lines.

Also thanks guys.

I realised I haven't touched a pencil in a while because I've been fiddling digitally so here's something

His right hand went wrong.

Getting there, Matty. Looks like your values got flattened out when you scanned it. Consider darkening up some of the shadowed areas like you did in the eyes and eyebrows, especially occluded shadow areas where no light would reach. Better contrast = more depth.

@Non, perhaps you're just not accustomed to it, I know when I finally got my tablet it felt really unnatural to not look at the drawing surface. In my experience it's not a whole lot like drawing with a pencil aside from the way you hold the stylus, I mean, there are things I cannot do with a pencil that I could do fairly easily with a tablet, and vice versa.