I really like the way that shadows alter perspective and your perceptions of everyday objects. They can make the objects more benign and sometimes make them more sinister than they really are, not quite mind altering but remember the shadow at the top of the stairs when you were a child?
When it comes down to it I simply like a good collection of shadows.
Here's a couple of quite gentle and obvious examples and they won't give anybody nightmares; there's one thrown by an old Victorian seat with a softer representation of the flowers and another showing a dense shadow created by some potted flowers and even the presence of the purple flower makes the shadow more intense.
Well, I like them, and they only come out to play when it's sunny.