This infographic/cheat sheet from Zippi might be helpful for those looking to get out of auto mode and gaining more control over their cameras. While section 1 is much more for those shooting with film the rest is relevant for digital photography.
I really like this photo as it is not just disguising the person themselve but it is also disguising emotion that the girl is feeling. It almost gives the impression of an explosion of feeling and emotion. It can also present the feeling of insanity.