Anything that you could wish from an Animal Crossing server, simple, and it just works. You can...
Share your Friend Code, Dream Code, Dodo Code or your art.
Talk about New Leaf, or New Horizons, or... just off-topic stuff.
Exchange your items or villagers by sharing them in channels.
Moderate and interact with your mods in Staff Only channels.
PS: In terms of roles, I know that this server lacks interesting roles, but I think you can come up with something good. I already have some simple roles waiting to be assigned :D