"I've never seen The Invisible Man."
I saw what you did there… 
Lots of good ones on the list. As much as I love (and rewatch) Godzilla, it's not a Horror film or remotely having to do with horror tropes (undead, witches, masked murderers), so I had to leave it off my list of "most watched."
Also had to leave off the excellent The Haunting because I've only seen it the one time. It's really not a film you can watch again and have the same experience as the first time. Well, at least for me.
Two comedies survived— The Ghost & Mr. Chicken* ("Attaboy, Luther!"), and Ghostbusters. But since both are built entirely around horror tropes, they make the cut that Godzilla did not.
*(I accidentally typed The Ghost & Mrs. Chicken, which would have been a great title for a sequel.)
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