Have you ever wandered into a library and not been sure want you feel like reading? If so here's an experiment to try.
Look at the books on the shelves and pick ones to read based purely by the cover. don't read the blurb, or anything about the book until you get home and start reading it. See what sort of books you pick based purely on what they look like. Does this say something about what you like to read, does a certain cover appeal to you, did you find yourself choosing books you wouldn't normally?
I'll leave you with these thoughts and get back to my reading.