I like to think of the head as a really neat Flip Flop Book.
Have you ever seen one of those? It’s a little tiny booklet about 4” x 1 1/2” with a folding piece on either side the same dimensions. It is usually a drawing of a person, full body, standing. The two folding pieces are cut horizontally to form little flaps that fold over the center illustration. On the back is another illustration of the same part of the character, either the head for the top flap, the torso in the middle flap, and the legs for the bottom flap. By folding these flaps over the central character, you can change their head, body or legs into humorous, goofy looking characters. It’s amusing for about 2 minutes, but I think you get the idea. Here’s a drawing of one just in case you don’t quite know what I’m talking about.
If you think of your character’s head in a similar way it might be more easy to come up with a wider variety of character types.
