Used to be spiders but I've managed to get over that. I no longer kill spiders I find in my home (unless they're known to be harmful to humans). I like to keep them around to keep the bug population under control.
I have a fear of snakes...bad fear of snakes. Growing up I was taught that they were not to be fooled with and watched my father shoot copperheads every summer at our pond. Like spiders I've managed to control that phobia to an extent..at least enough to take aim when needed.

Even though I hate snakes I always make sure that the black snakes around my home are well fed..they eat the rats which is a good thing. ^^ Right now I have a 5 - 6 foot long black snake living in my basement..somewhere. He got in a few months back and as far as I know he hasn't found his way back out.