He is, and has been, my favorite artist since I was a kid.
I'm just curious to see if there are any other fans out there, and if so, please explain why his work speaks to you.
Excerpted from the introduction of, "M.C. Escher: The Graphic Work", Escher reveals a bit about himself in stating that:
All the numbered reproductions in this book were made with a view to communicating a specific line of thought. The ideas that are basic to them often bear witness to my amazement and wonder at the laws of nature which operate in the world around us. He who wonders discovers that this is in itself a wonder. By keenly confronting the enigmas that surround us, and by considering and analyzing the observations that I had made, I ended up in the domain of mathematics. Although I am absolutely innocent of training or knowledge in the exact sciences, I often seem to have more in common with mathematicians than with my fellow artists.