If you find Dead Space creepy at all, something's wrong with you. It's shock horror, not creepy horror. Like comparing Doom 3 to Silent Hill.
If you can see the scary-ness, and not fake being scared just to be funny. you are sane.
but sometimes its like OSHTOSHTOSHT scary
like you are somewhere, and then all of a sudden you see teleporting tank-like necromorphs heading straight for you.
and then you realize you're all out of force gun ammo