I think it would be cool if people could choose different d-pad moves. Like a slow sarcastic clap or a laugh. I feel it would add a bit more customization, but then again, maybe I'm just greedy.
Could be done in a way where you can unlock new ones.
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This has all of my yes. It could be like Dark Souls, where you learn different Emotes by talking to certain NPCs or doing things for them.