It might have something to do with the fact that I read all the books that were released over and over again during the time period between when they were released and when the movies started coming out, but I have a picture of Harry in my head that's definitely nothing like DR. I can't picture him as real person even - he's more of an animated drawing. Snape, however, is a different story. He DOES look a lot like Alan Rickman when I picture him in my head, but a bit younger, a bit uglier, and a bit more severe looking. He also comes across almost as an animated drawing, but not as much as Harry does. And he's an exception, because I don't picture ANY of the HP book characters as their movie counterparts.