I've been (blessed?) cursed with a photographic memory, while not on the level that you see on TV, I can recall past situations/events/conversations/etc with relative ease. I don't exactly have control over it though and sometimes my memory just doesn't "come" to me like I want it to. Being a landscape and nature photographer though, this is extremely helpful because I can look at a photo and remember most everything about it...years after I saw it.