I enjoyed the flashback/present day narrative thread, which added so much to the book's complexity. I feel like this is just calling Asterios Polyp a graphic novel is an understatement. It's also a visual masterpiece, it's a coming-of-middle-age story, it's a puzzle, it's a love story. Basically, it's much more than a novel.
This is a complex and beautiful book, so layered and detailed that it begs to be read again and again. I read it twice, starting it again only hours after I finished it. I've since been occasionally Googling it to see what others thought and what they've caught that I missed.