I've given Moons to Zell and Ruby (to replace hers) And I have spare gorgeous furniture incase Zell gets rid of his ~ thankfully hasn't happened yet, but I am certain as soon as the 15th rolls in and Gracie stops selling it he's going to start being trouble.
I've also given Zell, Diana and either Muffy or Winnie Shaved ice lamps after being left with 15 of them before.
I used to give all sorts of expensive bugs and furniture to my residents in my Japanese town, when I'd be talking to them, and all of a sudden I'd hand something over and have no idea why, lol. My English town, I don't give anything expensive. I think they've noticed too because they keep calling me a bell pincher.