I have a pathological fear of daddy-long-legs (or crane flies, if you prefer). I know they're harmless, but they look so shrivelled up and dead, and when I hear that rattling noise they make when flying against a window, I'm ready to freak out. Thankfully, I live in a larger city now where I've never come across one, but when I'm at home, there's always MASSES of them (esp in autumn) and my dad has to come and rescue me.
Also, I really, really, really hate syringes and basically anything doctors do with needles, to the point where I absolutely avoid seeing a doctor even (or esp) when I'm sick. I know it's potentially dangerous (I haven't been vaccinated in about ten years) and I know I really have to get over it, but I just can't face it. I do go for annual check-ups and suchlike, but never when I display actual symptoms (i.e. when there's the risk the doctor will actually DO something). Thankfully I rarely get sick.. but I'm dreading next year when I have to get a work visa for Russia, because they require an HIV test and they have yet to invent a non-invasive method to do it 🙁