*reads all those inking/pencilling posts*
Well, i have heard and talked to people complaining how hard it is to ink over pencil shaded stuff. The problem usually lies on the pencil used. Soft pencils are more darker and therefore dirt-inducing. As we all know, it sticks easily and can be difficult to erase. One of a soft pencil's major downside is the difficulty to ink it.
If ink doesn't stick on the pencilled paper, you might be using a soft pencil. But it doesn't end there.....
A Hard pencil can be inked over more easily but it's not safe from inking problems. It is hard and pointy, and with this, if the user ain't careful enough, it can leave deep grooves and cuts on the paper that can ruin ink lines.
So it's USUALLY just a matter of hand control, preference, and pencil choice combined.
@Aya-kun, your style looks positively crude. Most monochrome-preferring artists end up with crude looking pieces. I agree with you on how you prefer your art to be monochromatic. I don't think your style will look better with colors, its strength lies on its crudeness.
@Magik Sage, it seems you like doing fantasy art. I like doing those stuff too, you made a cute mind flayer. Your figures look Lego-ish, don't get me wrong, it's a compliment.
