I think my biggest phobias are snakes, heights and the supernatural.
Snakes are just really creepy because they're so hard to spot when you're walking and the way they slither around - just plain strange.
Heights I used to be very afraid of because I fell off a playground catwalk when I was really young, but I've sort of overcome this fear after doing things like cliff jumping at cottages.
Supernatural things like ghosts creep me out because of experiences I've had in the past. Just last night I woke up and went to the bathroom then when I came back into my room all of the lights were on.
I guess those sort of things better belong in the Supernatural thread though.