Unique UI wheels with user-made styles for each avatar.
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The user interface of Half-Life: Alyx reflects human resistance technology and the visual effects of the gravity gloves. Similarly in Second Life, DarnHyena has created a UI that reflects the world building he's crafted for his hyenas (see attached).
From the Hyeenu's tribal painted style to the Russells' deep holographic rings, having access to the background material of SDK3's UI wheel may bring folks a greater first-person connection with their avatar.