Great post, Minarvia. It seems this tendency to be simultaneously repulsed and attracted to a "scary" thing, image or story, is pretty universal.
I used to have a glo-in-the-dark poster of the Universal monsters that scared the bejeebers out of me when I was about 5, but when my father tried to take it down I became very distraught. I wanted to be scared of it; it must have served some deep need within my child mind.
(Incidentally, The Room in the Tower is by EF Benson, 1912. Le Fanu died in 1873, the year after his famous Carmilla was published.)
(Also incidentally, are those hardback EC collections the ones with the red covers? I gave my good friend, horror writer Stephen Romano, a set of those for his birthday a few years ago, and now every time I go to his place I wind up taking them off the shelf and leafing through them. He'd rather me read his work, I think, but there is something very compelling about those old Jack Davis and Wally Wood drawings!)