I was claiming deeper differences than that.
I was claiming that people like you exist, but are rare. Just like sociopaths exist, but are rare. So given the two possibilities, and knowing only that both groups are fairly rare, it would be silly to assume that someone is probably a good roleplayer instead of a sociopath.
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: