I tend to have a really high visual memory, but I also have the monologue, which means that when I read, it's kinda like a narrated movie, which allows me to speed-read fiction and non-fiction with pretty great recall, but it annihilates my ability to do abstract math that I can't visualize. Fortunately, most things I work with are within Newtonian physics and probability, but anything outside of that is a nightmare for me to memorize.