I am quite pleased you enjoyed it! I find subtle horror to sometimes make one feel more uncomfortable and uneasy, especially when dealing with something shrouded in mystery you have no idea what's going to happen.
I can agree, horror isn't really my thing, but when I do enjoy it, it's when it's more of a mental horror. I know the creepy stories that I still think about years later have never been the graphic ones, but the ones that leave a little more to your imagination and twist your mind with a subtle feeling of unease.