LINES: Qualities, Textures, Colors

This starts to get a little more into physical character development. What kinds of lines exist: Heavy/Thick, Thin, Perfectly straight, scribble, swirly, dotted, globby, sloppy, streaky, erratic...etc. What leads the character? Is there a location of the body that movement is generated from or around? What line is drawn in space by the character? What color is it? These lines are not only on the floor but also through 3D space.