What are some movies you, personally, find so awful that you just can't help but love them? One of mine is "Dead Silence". It is so freaking terrible, and I love it.
I also like the "Conjuring" movies, especially on days when I'm feeling kind of melancholic and bored. They are so textbook horror that, even if you've never seen them before, you can pretty much guess everything that is going to happen before it actually does. (With the exception of "Annabelle: Creation", which broke the formula at least a little bit.)
I've loved the horror film "Gothika" for years, despite it being yet another "possessed woman winds up in a mental health hospital, even though she isn't mentally ill" film.