I think so much of the horror film is about our primal instincts, and our primal instincts are not just towards violence. It's also towards sex. I feel like horror movies, as much as they're about violence, they're also about sex. It's about our instincts, so in that regard, it's crucial that you honor both of those things.
The more work you put in on your outline and getting the skeleton of your story right, the easier the process is later.
The greatest villain of all time is The Joker - he always has been, and I don't know anyone who's not going to have Heath Ledger's performance burnt into their brains for the rest of their lives.
With horror movies, a bigger budget is actually your enemy. You want to feel the rough edges, the handmade quality to good horror films. It's a genre that benefits from not having everything at your disposal.
Like everyone else, I love 'Born Again:' that was a seminal work for me. Everything Frank Miller did on 'Daredevil' is like the Bible.