I am afraid of pitch-black, total darkness. But I don't think I've ever been in such a place because there's always a source of light somewhere (from under the door, moonlight from the window, etc).
Me too-I am scared of complete darkness but like Laure said, in most places theres always light coming from somewhere.
When we first moved into our house, my room was completely dark because the tree in the back blocked the moon and my room wasnt near the front where cars pass by. And on top of that, I have black walls. I used to sleep with a small night light

but it died without me even realizing it and I had slept a few days without it so I stopped using it. Now I am used to it and prefer a dark room.
They cut down some branches of the tree so now I have light coming from the moon.