I know I've done it. I've judged books by their covers. And a good cover will practically have the book leaping into my hands. I think covers are so crucial to a book's sales.
Of all my books so far, there's only one that I thought was kind of lack-luster. As for a favorite- it's a tie between my second book, No Time for Love, and my most recent, Isabelle Webb. Mystery/romance is what speaks to me with both of these images.
Have you ever read or not read a book based solely on the cover?