I just changed mine, too. The background picture is a close up of a daisy with the fuzz beginning to form.
My screensaver consists of photos of my family. I keep adding new photos as my goddaughter sends them to me. Latest are of her two children (7 & 5 yrs.) with Chloe, the puppy Santa brought them. Chloe looks just like Marley from the movie (yellow lab), and is misbehaving in similar ways! Chloe is currently "failing" obedience classes.
But she's sooooo cute!