Will check out videos when I'm at home. Eraserhead sounds like more my kind of horror than most. I don't like typical horror movies. Supernatural shock horror, slashers, torture porn (like the Saw movies), etc don't really do anything for me. I like to actually be disturbed and test my emotional fortitude.
28 Weeks Later was another great one that hit me in a deep spot, for example. It wasn't about the zombies or the suspense of the situation the characters were in... it was the complete reversal of the typical horror movie ethical message.
Specifically, the way most of the characters had good intentions and were generally reasonable throughout the movie. Most horror movies have the shit hit the fan when someone gets selfish, mean, or generally stupid. This one had everyone reacting to everything quite reasonably, competently, and without unnecessary ill-intent... and it turned out that everyone should have been more cold and ruthless all along. Being compassionate in this case ended up being the WRONG thing to do. That cut me deeply.
I was actually disappointed by The Descent. It started out amazing. The fleeting glimpses of the creatures and the tension in moments like when the girl was halfway trapped in a tunnel that was caving in... fantastic stuff. And then the last half of the movie is all in your face and orients itself around a petty catfight... bleh.