Tonight is Halloween, and it's a perfect night to pop in a scary movie. But when it comes to horror movies, you've got a ton of choices. Slashers, zombies, aliens, it really depends on what you're in the mood for. So, here's my picks on some of the creepiest horror movies for any kind of horror fan.

Slasher Films
One of the more popular horror categories, these movies usually involve a group of dumb teenagers and some kind of crazed killer. You can pretty much guess what happens from there. These movies also brought us some of the scariest and well-known characters in horror movie history, like Freddy Kruger and Michael Myers. Some classic slasher films include Nightmare on Elm Street, Friday the 13th, and of course, Halloween.

Scary Psychos
On the other hand, you have the "psycho" films. Now, you could call the slasher films villains psychos too. But there is a difference between the killers in the slasher films and the more realistic villains in these films. The killers in these movies are regular folks capable of doing some very gruesome things, and that's what makes them so scary. For more of a psychological scare, watch Psycho, Misery, or the thriller Seven.

Ghost Stories
I'm not talking about your typical "sitting around the campfire roasting marshmallows" kind of stories here. We're talking evil, vengeful spirits that wreck havoc in the world of the living and make for some of the most chilling horror movies around. The "Ghost Hunters" have got nothing on these guys. If you're looking for a good ghost story, try The Amityville Horror, Poltergeist, or the more modern Paranormal Activity.

Zombie Movies
One of the big trends in the horror genre right now is zombies. As a matter of fact, this genre alone is worth over $5 billion. If you want to get in on the zombie craze, check out Night of the Living Dead, Dawn of the Dead, or anything else by zombie movie director George A. Romero. Shaun of the Dead and AMC's popular TV show The Walking Dead are also good choices.

Vampire Movies
Another popular horror movie monster is the vampire. And no, I don't mean the lame, sparkly, teeny-bopper vampires in those Twilight movies. I mean real vampires, vampires that are dark, super strong, and show no mercy to humans. For some real vampire movies, try Bram Stoker's Dracula, From Dusk Till Dawn, and John Carpenter's Vampires.

Sci-Fi Scares
Sometimes, horror crosses over into other genres, like science fiction. Instead of being trapped in space, you're trapped in space with a vicious alien life form that's trying to kill you. What's scarier than that? If you're looking for some good sci-fi scares, check out Alien, The Thing, or Predator if you want a little more action in your horror.

And so, there you have it. Now you have plenty of choices for a truly scary Halloween movie marathon. (By the way, I've only made it through one of these movies from beginning to end, and I only watched is with my fingers covering my eyes and all the lights on...)