I'm not particularly scared of the usual things, when I get the feeling that supernatural things are watching me, I usually try to talk to them. None of them have responded, (Seriously, I'd post some of my experiences with such things, but they're not very climatic, they all end in me figuring out that whatever I'm seeing is something silly or me saying "Hey, what's up?" and the nasty feelings going away)I figure if they're powerful enough to fuck with reality and my life, there'd be more unexplained deaths.
However, I've got a dreadful fear of things that are... unnatural. I'm not sure how to explain it, but like, things that are just... not right. For example, there's a pic I've seen on here and on /b/ a few times of like... this humanoid-ish thing with an abnormally large head that's all wrapped up in bandages in an empty white room (I think there might be an old hospital bed in it, not sure) Seriously though, just typing about it gives me chills. Also like Abandoned Clown Train, that sort of shit.
It's happened to me a few times that I see like this when I wake up in the middle of the night (Like, I open my eyes, but the section of my brain that recognizes objects isn't booted up yet).
Not really related to a fear, but I also have a bit of a fascination with unmapped things, like the Paris Catacombs. Stuff that people have built over hundreds of years and have since forgotten or neglected. I like to think that if I lived in a city that had such things, I'd be man enough to explore them, but I live in suburban phoenix, so yeah... I'm SOL in that aspect, but any creepypasta related to such things would be awesome.