Editing Category:House Rules For v3.5 (section)

==Encounter Reactions==

Unlike in v3.5 where NPCs always greet PCs with indifference, encounter reactions will be rolled for every encounter giving the possibility for the PCs to meet NPCs while they are preoccuppied with their lives and living in their own emotional moment. 

Also, Wandering Monster Checks will also require encounter reaction checks, where appropriate.  Thus, a band of brigands may be predisposed to let the PCs go unhindered and even offer information (for a price) giving the PCs a bonus in diplomacy or the brigands may be more predisposed to fight than to collect any tribute. The Dungeon Master will reflect the attitude of the opponents encountered through dialogue or action. 

Monsters that are specifically described as always hostile and aggressive, such as Owlbears, will never require a roll to determine their encounter reaction.