I think the “right” answer is likely 3D crypto punks or bored apes type artifacts…. Provably unique but not necessarily tied to your biometric uniqueness.
Though using biometrics to generate unique avatars through a crypto generation function would be great
I’ve always done the stock-approximation thing. The idea of performing a fantasy persona leaves me strangely meh. I think I went to exactly 2 costume things as a kid. Once as a clown, once as a pirate. Didn’t really get the appeal.