I, too, enjoyed watching it when I was a kid. There was such an explosion of TV shows in the mid-to-late sixties, some comedies, other dramas, that were supernatural or sci-fi based. Along with The Ghost and Mrs. Muir, we had Betwitched, I Dream of Jeannie, My Favorite Martian, The Addams Family, The Munsters, Nanny and the Professor, Voyage to the Bottom of the Sea, Lost In Space, Star Trek, The Invaders, The Time Tunnel, Land of the Giants and, of course, DS. I'm sure there were others that I can't think of right now (shows like The Twilight Zone, The Outer Limits, Boris Karloff's Thriller and One Step Beyond were more from the early sixties/late fifties).
Also, if one has never scene the 1947 film based upon the original novel, starring Gene Tierney and Rex Harrison, by all means, make sure you do. It appears frequently on TCM, or just rent it. It's an absolutely wonderful film. I still cry my eyes out at the ending. You will, too.
Gerard