I'm a sadistic pervert. I like anything fetishy or perverted. But I'm not attracted to being acted upon. I'm attracted to the sadistic or the active role. It depends on the person.
Some people are never satisfied.
Some people are thrilled to be in an environment where they can show their vulnerability or their tameness. And it's easy enough to see why I prefer the latter. But I enjoy a challenge too. If I never had a challenge, I would be bored. I get into the sexuality of it.