As a player, I've found that knowing I can't rock-solid trust *anyone* is right on the line between awesome and paranoia-inducing, in a good way. If I know that any NPC I encounter has an agenda, is part of something that I don't even know about, I interact with that PNC in a more complex way. In many games, NPCs show up for very flat reasons - to get shot, to impart info, to make the set look nice, etc, etc. In ApW, I may not know the reasons for the NPCs actions, but I know they exist. I also really like the moment when I figure something out about an NPC - "Aha! That was totally a Family:Close Ranks move! Now I have a (little tiny) key into that NPC."