Am I crazy?

I need to ask because I am scaring myself. I've noticed that I am definitely not what one would consider normal. I am the kind of person who can stand watching digusting things and laugh or not have a problem with it. I don't and never have given a lot of value to human life and find that, if I think about it, I don't have a problem using any force necessary to protect myself or others, even if it involves killing someone. My favorite characters in movie history are Alex de Large from A Clockwork Orange and Hannibal Lecter. I just find myself very disturbing and odd and it seems like something is wrong with me. I wouldn't go out and kill people or anything, but I've just noticed that no one quite understands me fully. I don't think anybody would really want to. I don't even know if I want to. But I've just been single for a very long time and I feel like maybe something is wrong with me...Is it possible that something is seriously mentally wrong with me?