Similar to how roblox does it, I think it'd be really cool if you could emote with commands. For example:
/e dance would make the player dance (minecrafty way)
/e sit would make the player sit (as in a minecart)
etc etc.
A lot could be ported over from bedrock, like Over There, Wave, Simple Clap, just the basic ones so the command list doesnt get flooded