Sit, sarcastic clever voiceline, wave, blow a kiss, fart, cry, pick up line, sing, dance, flirt, sleep. And more. Hell just have lootable emotes.
Add emotes that enemies and npc’s respond to. Like maybe youre siren has an emote where she blows a kiss and the bandit that was shooting at you responds by a sarcastic phrase or stops shooting you for a second.
Emotes that trigger a character to drop loot, or doors to be opened.
Have joint emotes where players can hug or high five each other.
Even an emote where your character shows off his equiped weapons in a comical way would be fullfilling.