I have an intense fear of spiders, always have since I was a kid. I have such a deep fear of them, it borders on respect. Rather than kill a spider, I'll actually go out of my way to get them outside (with a few exceptions, i.e. Black Widows, etc...)The ones I fear the most are the Wolf spiders, despite the fact that they're not poisonous and don't bite. They just move too fast, and jump too.
Scratch that. Cat spiders.

Nothing beats these as far as freaky things go.
Ironically enough, I don't mind Daddy Long Legs', even though (so I hear, at least) they're supposedly very poisonous, but their fangs are too small to pierce human skin, or something.. Maybe it's the fact that they don't really look like a spider all that much.
Jam it back in, in the dark.