I am combining the fave and your shadow themes by showing some of my fave shadows.
I should qualify this by saying these are some of my fave shadows after a very fast look through my photo archives.
I have probably taken other shadow shots that would be favorites, if I had taken more time looking through my archives.
The second shot is my shadow on an oak tree and the third shot is my shadow on the beach. I like the shot below because it's hard to tell where the grass ends and the shadow begins.