it's actually the dark here that wants to eat your face.
This made me lol!
I think the Vashta Nerada work because of the space suits and so in another setting would actually be a bit pointless. What's creepy about them, for me, is that they are essentially walking skeletons but again it only works because of the suits. If they are just flesh eatings shadows it takes a bit of the fright away for me. Still good baddies though. I'm not sure I would have put them on my list, but mostly because I would have overlooked them and not because they are undeserving.