Blah, those movies are classics, hence the reason why the top 20 are scored so high, yet not that great. For example, Evil Dead (1981) was loosely redone as Cabin in the Woods (2012) and Cabin in the Woods is certainly better than the first; better character development, storyline, twist, cinematography, etc..
Room 1408 has suspense with some (thankfully not too much) shock horror thrown in. Add to that another good performance by John C.,the heartbreaking moment when his daughter dies in his arms, and that he kills himself to end the curse, and It makes my top 10. Old movies are great and all, just like old cars, lots of character, but really not that great at the end of the day, trumped by more modern productions.
Frankenweenie and Little Shop of Horrors gets ranked ABOVE woman in black!? How are those even horror movies? King Kong gets #13!?