I honestly think this digitally inked/cell-shaded style is harder than a more painterly approach. Also, I need a lot more practice at shading and highlighting - especially faces and wrinkled surfaces.
I "cheated" on the chainmail. Instead of actually inking and coloring it in by hand, I used a variation of a tutorial I found on deviantart.com that uses a Photoshop filter. Here's a close-up: