Repeating Myself - in a good way

I have recently chosen to create two art quilts comprised of multiple images of wonderful exciting shadows! How many times have I already been drawn to this subject matter? Cosmic Bicycle, Magic Wall, Purple Stroller. Only three times? It seems like way more than this.So... after reviewing my inventory list back to 2003 I discover that 10 additional pieces were created using multiple images. But, in these the principle subject remained solid - people, pets, canoes - rather than the shadows. There are 25 more pieces (single image) where cast shadows play a big role and 8 more pieces with light being an important element.Many artists gravitate to images seen at the ends of the day, when shadows are long and light dramatic. I am not alone in finding this combination irresistible.When I take this further, and use multiple images, the viewer is made aware of the fun relationships of subject and shadows. A theme emerges. The device of variations on a theme are employed in all art forms - for example: choreography, story line, music, cuisine, landscaping, and fashion. Like those other artists I will probably repeat myself many more times. I can't help it.