Used to be spiders which always did annoy me as I am pretty much fearless with regard to wildlife otherwise.
Anyway when I was 30 I went back packing to S.E. Asia, first night anywhere rural in a wooden hut goes without saying there was a fucking Tarantula on the ceiling. So it was either get over it or abandon the trip and fly back home. The following day with the help of an elderley local gentlemen some very strong rice wine, a bubbly pipe thing, and a box of massive spiders we managed to cure the fear.
So much so that in the years since I have regularly handled Tarantulas including the Goliath Bird eater. I have actually been bitten by a Salmon pink bird eater when some little prick fired a water pistol at it whilst it was on my hand.
I do have a fear of cash points and using them gives me a panic attack and sends my heart racing other than that I am phobia free I think.