Favorite:
I'm a fan of slasher genre/subgenre, for some reason psycho killers films are enjoyable to watch, this fascination began with Scream 2, so the Scream franchise holds a very dear place
Saw franchise is creepy fun, I don't watch Saw movies for the story, instead I love them for what it allows my imagination to unleash in terms of methods to escape traps, and fan fiction imagining characters I like in those traps, and how they might react. I read on page 2 someone recommending Cube as a better puzzle-traps film, so I guess I'll give that one a shot
Friday the 13th franchise is another favorite, I don't like how that one is repeatedly resurrected or how his strength increases, but the story of a mute psychotic killer with sick obsession of his mother (momma boy) has its charm
Scariest:
Saw, to survive traps one must dies or lose parts of his/her body. Seeing the cuts is creepy
I need to watch:
The Shining
Cube