A good horror movie should give you shivers - seeing bloody gore is not horror, it's horrific. Two of the best horror movies I have ever seen are 'The Haunting' the old B&W version, not the Liam Neeson version. The other was 'The Entity' which was really creepy and allegedly based on a true story.
Seeing arms and legs hacked off and guts sprawling all over the place is crap and is aimed to shock rather than horrify and once you've seen it all, there's nothing left to horrify you.