I actually really like Human Centipede and can't wait for the sequel. I didn't find it as disturbing as some have, but I remember back in the day, seeing some of the scat sites like shitcity.com and this had nothing on those, haha.
Serbian Film is just shock for the sake of shock...zzzzzzzzzz
A little film I enjoyed was "Grimm Love". It's not a horror movie in the sense of violence, gore and a dude in a mask offing teenagers...it's a slow burn and more of a chilling look at the human condition. It's about a journalist seeking out the tape of a guy that wanted to eat someone and someone that wanted to be eaten.
There's no gore and very little violence, but it's a haunting little flick that I really dug and recommend as something for those looking for something a little different.
http://www.imdb.com/title/tt0448400/