Hello, I want to say this is just to list the ideas in multiple post should you can pick and choose which you want to work on given your interest and time. Also i just wanted to post there here b4 i forget them lol.

Starting with number #1. Have NPCs interact and do more things when strolling.
The way i see this is NPCs sit on chairs (MC and modded) for a random set of time seconds to minutes and get up and move. Randomly open chest to simulate looking for items. Going on boats if any are near and rowing for a random set of time. Npcs sleep or lay on beds (MC and modded) either during the night or randomly. Down the line if people request compatibly with mods that use certain items can be interacted in stroll that could also work.

Thanks a lot for all of the suggestion, some of them are very interesting but needs some brainpower and time to implement. 🙂