...I will think about Japanese ghosts.
Those ghosts seem to have a subtler, more aesthetic afterlife than American ghosts. Our ghosts here don't have much imagination. They just bump around and make people nervous, or have a rather morbid, antisocial disposition. They smell of gravemoss and act like jerks most of the time.
Japanese ghosts are quixotic things. Instead of jumping out and saying "Boo!", they want to build up a complex and uncanny metaphysical relationship with the still breathing.