Currently, each class, race and gender has a specific emote mapped out. I think it would be cool if we had the ability to buy emotes with glimmer and customize. Of course, each guardian would be forced to have 1 sitting emote, 1 pointing, 1 dancing and 1 waving.
On a side note, it would be cool if there was a whistling emote
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you should change your topic by adding "pay glimmer for emotes"