I agree that we all have photographic memories and it would be great if we could just call up the visual memory of something when we need it. It seems to me one thing that makes memory more photographic is that amount of emotion attached to it. That's why we remember things that we worked on better.
I also think wouldn't it be great to just recall whatever I read photgraphicly but then I wonder would I think about what I read or would I put it of till later, most likely the later? Wouldn't a photographic memory be like a parrot repeating the words that it hears without understanding the meaning? When I think about what I've read then the original text is not as important anymore. The thoughts and ideas I've had about it would have changed it. I notice that I readily remember information from a book that is important to me and the rest seems to be redundant. When you consider that 11-20% of a book is the important stuff... Why would you want to remember the rest?
Alex