Irregular shapes like these below call for better texture placement than a simple projection. The texture stretches whenever the polygons aren't parallel to the projection.
Some polygons get only a tiny slice of the texture.
Complex folding areas like the ear not only stretch badly, they also get repeating portions of the texture map from the projection. Now there's YouMap. With YouMap, the UV's from the Nurbs Guide are interactively projected onto the polygons. Instead of stretching, textures can flow smoothly and evenly over your polygon objects, and in just the arrangement you think will work best. So you can texture all the regions of a character or complex object separately using distinct UV arrangements which you control.