Sounds simple enough, right? Ten keybinds each change a player's avatar to one of their ten avatar favorites.
But we already have the favorites all you have to do is open options :O!
Yes, but these keybinds would enable rapid response times. You know those reaction face decals in the add-on section? With this, you could have your default avatar and a copy of it with the reaction face. Then when something worthy of the face happened, you just press Ctrl+3 or something and your avatar changes to match your mood!