I've just read a book by the person behind this site. Dr. George K Simon. He has an interessting take on "the everyday psykopath" and calls them covert aggressive. The difference between a psykopath/sociopath is that the covert aggressive ones tends to stick to the law while a sociopath has no regard for any kind of rules. The sociopath may have covert aggressive traits tho, so I guess the labels are to some extent overlapping.
"Covert-aggressive personalities do their best to appear benign on the surface and to veil all their aggressive agendas. Their use of tactics to conceal their aggressive intentions while simultaneously getting the better of others makes them one of the most manipulative personalities." ~ Dr. George K Simon