It just seems like to me in other MMO's, the NPC's have such limited interaction. There are the NPC's that kill you, the NPC's that ignore you, the NPC's that give you a 1-sided speech, and the NPC's that run stores.
In other MMO's, it seems like there are alot of NPC's that just hate the sight of EVERYONE. For example; A raider decides to mug you, do you;
A)Give him all your possessions so he'll leave you alone
B) Comprimise or barter for your life
C) Attempt to Intimidate or Charm the Raider
D) Hit him in the face with the closest thing at hand
E) Pull out your guns and fight for your life
Variety is the spice of life