I picked up a book on M.C. Escher's work last night. I can't believe that I hadn't even thought about that when I was deciding how to decorate the house. Of course I'm going to be putting up my favorite movie posters (finally framed) and some random goofy posters for the office (e.g. the "Wile E Coyote Acme Parachute" poster) but Escher's stuff would be great in random other parts of the house.
No, this isn't a huge revelation or earth shattering discovery, but it made me happy. Soon my walls won't be quite so bare. This is a good thing.