Hmm... I figure I have quite a few, but I'll list some that I can remember, for now.
Bugs (Spiders go in there, as the main one.. xx)
Violent deaths
Losing loved ones
Fire/Heat*
* Dunno why, but I've had some extreme fear of fire.. xx;
Which isn't too good when cooking. xD; If anyone's ever been to a Japanese steak house, where they cook infront of you, and the fire shoots up... yeah, I pretty much back up as far as possible.. ^^; (still fun seeing it, though..)