There really isn't a "best" origin, the origins are for like roleplay so the "best" origin(s) depends on what role you're trying to play.
For example if you wanted to play a more naturally slutty character the exhibitionist origin wouldn't be a bad choice, though Sam will refuse to wear the more conservative underwears in the game.
But if you want my opinion the male origin is the "best" simply because its the most interesting of them and presumably will have the largest impact on the story.