For me, it would be making new friends. I have social anxiety and it's hard as hell for me to talk to someone who I don't know. Aswell as I sometimes hallucinate/imagine stuff when it's dark :/ What about you?
the dark. I saw this pic of jtk once and I keep like seeing it in the dark. i know that sounds really cheesy/babyish or whatever but srsly I have to have a night light
Heights (even though I'm tall -_-) Losing those who I love Tarantula hawks. They have the second strongest sting/bite of any insect, and where I live we get tons in the summer ;-; And I'm pretty sure their stingers are about 4 cm long o.o
There are too many things to put in a post, but here are some: Heights, the dark, small spaces (I have claustrophobia), death, people, loosing friends.
I'm also claustrophobic, so yeah that and yeah besides that sharks and oblivion (unintended reference, I'm actually scared of that)