chicken

my non-verse answer on the game face? vampire minions, destined to die a quick flamey death are all sadly afflicted by what I once saw referred to as "permanant game face syndrome". On the other hand, you can tell which vampires are going to be important to the story because they'll switch back and forth, as the drama requires. But: in s2 AtS, when we see Angelus being introduced to the Master for the first time by Darla, Angelus makes fun of his face, and Darla responds that the Master's grown "past the curse of human features" and when Angelus hopes out-loud that it won't happen to him, the Master says that he probably won't live that long. That coupled with Kakistos from s3 leads me to believe they're in general going for "the older you get, the more animilistic you get" kind of thing...