Resurrecting this thread speculating why my memory is only photographic for golf courses and the shots played. Is it because 18 holes and averaging less than 5 strokes per hole fits nicely into a memory structure? Or is it because a round of golf is enjoyable, relaxing, nearly meditating so it is more likely to be remembered in that state? I can recall most courses, hole by hole, after playing just once, most definitely twice. I would like it if work related or reading tasks would hold the same level of remembrance but they do not.
I do recall (ha!) reading that those with amazing memory skills used techniques which mentally placed items to be remembered into categories, or a simple outline structure. Perhaps 18 holes with standards like par and yardage, combined with feature sets (tees, fairways, greens, hazards, etc.) and short groupings (tee, fairway, approach, putting) makes it more likely to be remembered.