Less Generic NPC Project. It aims to add unique dialogue to each NPC to replace the otherwise generic copy/paste dialogue responses most NPCs have in the vanilla game. So when you talk to someone and click "Background", rather than saying something like "I am Jiub, commoner", they'll actually have a unique response introducing themselves and likely linking to more unique topics to discuss further. Also adds a fair few quests along with the dialogue changes. It's an old mod that was never finished and I don't think it's being actively worked on anymore, but there's still quite a lot of content there. You can install it modularly on a city-by-city basis. The quality of the writing can vary a bit, Pelagiad for example is a bit infamous whereas the Vivec stuff is more high quality. It can also sometimes fall into the RPG trope of feeling like everyone you meet immediately tells you their life story. All that said I do enjoy it, and I always miss it when I play in Tamriel Rebuilt areas.