No I do not believe in supernatural events or entities.....
.... but....
... I do accept people sometimes have uncanny experiences, and some ascribe those to "ghosts" simply for being alarming and of no obvious or simple explanation at the time.
I think hypnagogic dreams come into this category, as their effects are common, anecdotal "ghost story" themes.
I enjoy good ghost stories, as entertaining fiction; but am also curious about the genuine causes of real experiences.