Approximately 1 in 100 people are sociopaths, and while many of them end up in prison most sociopaths to my knowledge tend to either be apathetic and amoral manipulative leeches, ambitious yet ruthless high-functioning types, or generally bitter social rejects. I knew a diagnosed sociopath (technically conduct disorder, but that's almost always a prelude to a ASPD diagnosis) in high school, and he was very charming and likable even as he was talking about murdering his family.
That said, the main element of sociopathy is a complete lack of empathy, which is surprisingly common even among "normal" people. It's likely that everyone in this thread has met a sociopath.
I don't get that feeling.
Even at my angriest, I do eventually feel regret for my actions.
What makes someone's brain incapable of guilt?