The /serve emote is great, it was a pretty exciting addition to the gem store. Would really like to see more persistent emotes hit the gem store in the future.
I'd love to see more multi-person chairs in the spirit of the teatime chair! It would be SO nice to have a novelty version of the already-existing Sweet Campfire Treat (or something similar to a communal boost bonfire that doesn't vanish so quickly), or a picnic chair- a few different skiff skins already have multiple seating arrangements, so this feels like something that could be doable.
Having multiple sitting poses available too would be great- love the night watch stool, wish I had the option to sit a bit less whimsically on it as a female sylvari, haha.