I think sexual preference is more likely to be a genetic disposition you're born with. Not so sure about socio- or psychopaths, but it could also be genetic. But that leads to a question about evil - is it evil if you don't realize what you're is wrong?
I will answer that later with a reference to Hitler, our favorite evil.
It may be that there are propensities rather than specific traits or genes. I have read that many CEO have psychopathic type personalities. Their behavior presents, by some interpretations a kind of careless, thoughtless activity that forgets moral boundaries. Having meet a few ceos I'd have to disagree, but then how do I know deep down where they get their emotions and ideas from? I was fascinated by how quickly Americans lost their sense of reflection after 911. 'Turn the other cheek' may be in the bible but few consider it. Any study of history shows fear, intolerance, excessive faith in one's own beliefs, dehumanization of others, victimizing, group think, ethnocentrism, xenophobia lead to bad places. When does empathy enter the conversation, I was listening to a conversation the other day on the so called fiscal cliff and the importance of a balanced approach. Now consider what that means morally. It means that some handicapped or poverty level children must give up some care and the wealthy person must forgo another Bentley. Exaggeration yes, but who suffers more.
"Evil is not to be traced back to the individual but to the collective behavior of humanity." Reinhold Niebuhr