MadBlue said:
Is it relative, though? For example, what happens if the NPC has an 18 Charisma and the PC has a 16 Charisma? Would the NPC be in awe of the PC, even though his own Charisma would provoke servility in others? What if the NPC has a 6 Charisma and the PC has an 8 Charisma? Would the NPC treat the PC condescendingly even though his own Charisma provokes a feeling of domination in others? What if they both have a 12 Charisma? Does the NPC see the PC as an equal, or does he act with deference? It would seem to me that there should be some kind of opposed Charisma check and/or massive table involved to determine what the attitude of the NPC would be.
I hadn't thought about it at the time of writing, but yes, it would be relative to the one with the lowest Charisma modifier. So, a character with a Charisma modifier of +3 dealing with a character with a Charisma modifier +4 would have a general attitude of Deferent toward the that character.
However, that does raise the issue of dealing with Charisma penalties, and your implied question about hostile vs. friendly interactions do raise an intriguing possibility. Looking over it, I think I didn't communicate the attitudes very well. It should be something like the following:
Initial NPC Reactions and Attitudes: First impressions mean a lot when determining NPC reactions, and those impressions signify how they relate to you on first meeting or through casual acquaintance. Basically, it's how important you seem to be to strangers and acquaintances. You determine an NPC's initial reactions by figuring out the difference between the Charisma modifiers of the PC and NPC in question, based upon the PC's Charisma modifier.
Charisma modifier -4 or lower: Barely paid attention to (Common Furniture)
Charisma modifier -3: Generally ignored (Nobody)
Charisma modifier -2: Constantly overlooked (Nobody Important)
Charisma modifier -1: Easily overlooked (That Guy/Girl)
Charisma modifier +0: Equal
Charisma modifier +1: Catches attention (Somebody)
Charisma modifier +2: Holds attention (Somebody Important)
Charisma modifier +3: Demands attention (VIP)
Charisma modifier +4 or higher: Enthralls attention (The Man/Woman)
Thus, when interacting with a Charisma 10 commoner, a Charisma 17 PC would demand the NPC's attention and would often be treated likea VIP (based on PC's score, it's +3 minus +0, which equals +3). However, when dealing with a Charisma 12 warrior, a Charisma 8 PC would simply be seen as Nobody Important and is likely to be constantly overlooked (based upon PC's score, it's -1 minus 1, which equals -2).
Even in hostile situations, the process remains the same. For instance, say that a party of elven adventurers are taken captive in orc territory. Given average Charisma for all of them, if one of the elves has Charisma 17, that elf is perceived (even wrongly) as a VIP and thus not to be used as trail rations like the rest of the party who used Charisma as a dump stat. They may still kill said elf later, but that force of personality may delay matters long enough to escape or negotiate a way out of certain death. On the other hand, the elf who has Charisma 6 may not even make it to trail rations, as the orcs may guess (again, even wrongly) that said elf is Nobody Important, and may very well treat him thus.
Granted, social visibility may be a double-edged sword, and social invisibility may be a blessing in disguise.