Which of the following unorthodox (nonhorror) ghost stories is your favorite?
Topper (1937);
The Ghost and Mrs. Muir (1947);
A Christmas Carol (1951);
My Neighbor Totoro (1988);
Always (1989);
Ghost (1990);
Six Feet Under (2001);
Dead Like Me (2003);
Volver (2006/I);
Ghost Town (2008);
Under construction: Don't publish until ready:
http://www.imdb.com/list/ls075446705/
NOTE: Ghostbusters will not be considered. Technically, it's not a horror movie but it's still an orthodox style ghost story, albeit an original and very funny one.
Casper (1995) and its TV versions has too many traditional ghost story aspects, (characters outside of Casper himself who try and haunt the living).
Beeetlejuice (1988) has Beetlejuice. He's the reason why that film doesn't qualify.
http://www.imdb.com/list/ls075446705/