This NY Magazine article discusses the transformation of the fictional character Dexter, from cold-blooded killer to soccer dad:
Dexter returns for its sixth season on Sunday, and with it comes the requisite gore deftly contrasted with the brutal sunshine of Miami. Some things never change! But some things really, really do. Like Dexter. Over the course of the series, he's gone from stone-cold sociopath to slightly-less-cold lovable vigilante. Whatever moral ambiguity the show used to embrace — is it okay to ... root for a murderer? — is gone, replaced with a strange certainty (definitely root for this murderer!) that takes a lot of the creepiness away from the show. How did Miami Metro's favorite blood-splatter analyst go from his pas de deux with the Ice Truck Killer in season one to trying to get his son into a prestigious nursery school in season six? By following this plan to go from scary serial killer to soft suburban dad in these seven easy steps!People ask me whether I think Dexter is an accurate portrayal of a sociopath. I say that in the first season, maybe second, it was so eerily accurate on some of his internal dialogue that I thought there must be someone on the writing staff or a consultant who was a sociopath themselves. Now I still watch it and it is entertaining and makes me want to live in Miami, but not so much accurate.
By the way, how to achieve your own predatory stare? Practice a half smile in front of a mirror, then while maintaining the smile, add a sneer gradually until you get just the right mix of sinister masked by friendly.