High Likeability Dialogue
This is really good, thank you! I have a contribution I will add to the relevant talk page in a moment.
So far my assumption is that the earlier NPCs (G1-3) have a much more... intimate system with their Keywords. Several NPCs of the same era don't really respond to anything, but have a lot of default Private Story responses (looking at you, Chapter 2 and 3.) And then there's Chapter 7... Hoo boy. Lots of Talky, but most of those NPCs don't even accept gifts.
As I'm learning more about the system I think I can more consistently study and record what value affects what keyword response, however I must wait as I have learned 24 hours is not enough time for an NPC's favor to decay naturally. Everyone is still "looking at me with great interest," I will say. Thanks again!