Phobia of wasps, but that's got so much better in recent years that I'm not even sure I should mention it anymore.

Rational ones... I have a mix of respect and fear of the Ocean. Although my memory of this is probably worse than the reality, I nearly drowned as a three year old in the sea. I've no problem with swimming pools or water parks though; love 'em in fact. I am however a terrible swimmer, which contributes to the fear/respect.

I also have a fear of being depressed again. For all the nostalgia I have of my first year of university, I spent a significant part of it in a bad place mentally. This is unlikely to reoccur I think/hope, as I believe that the fact that I was barely sleeping, malnourished, and frighteningly often drunk probably contributed big time. I have none of those issues anymore.