Fear itself
I have no true fear, as in something warranting the suffix -phobia, but I have a few things I'm uncomfortable about such as:
-Needles/other pointy things directed towards my eyes
-Watching medical things (surgeries, vaccinations, etc.) on television. I'm fine with both the idea and the practice of them happening to me, but I can't watch it on TV.
-Hearing the crunch of an apple. I will leave the room. This isn't so much a fear as a dislike-with-the-fire-of-a-thousand-suns, though.
The only proper "fear" I may have is forgetting. Memories are ultimately the only keepsakes we own, and the thought of losing knowledge of what makes me me is fightening. It's abstract and hard for me to explain, but forgetfulness is the closest thing I have to a phobia. Nothing crippling, though.
Oh wait, one more; I hate darkness to my back. If I'm ever in a location where there is light in front of me, but darkness behind, I get irrationally frightened of the darkness behind me. Light behind and dark in front? I'm fine. I'm even okay with dark in front and dark behind, but as soon as I see a glimmer out of that darkness? Scared, and make a beeline for it. Using a flashlight is okay-ish; it gives me the same nervousness, but I can at least control where the light goes. There's probably a survival based reason for this one.
Edit:
I lied when I said I had no fear, it seems. I appear to have quite a few o_o