Lips and noses tend to be shaded unless it's a contour drawing. It's perfectly normal to do contour drawings but I'm not classifying it as so since it's not just pure outline.
[Image: http://img121.imageshack.us/img121/2116/editsv.jpg]
I don't know. Something like this. This is the best I can do with a mouse since my tablet is at home. [hits head on desk] I'm not trying to be mean (or trying to showboat)! I promise! Your lines are actually pretty solid. Much better than my sketchy stuff when trying to do lineart.
I guess I'm too used to doing drawings all sketchy and lame...