Saying that I’m from New Hampshire, or even the USA, felt too small and specific for a space station where not everyone might be familiar with Earth geography. Then, I could say I’m from Earth, but it seems like “which version of Earth?” comes into play, because there are people who are from Earth but aren’t human, or aren’t from the Earth that I know. So I debated for a while, and landed on human. Although now your question makes me wonder if it’s equivalent to introducing myself as Caucasian, and I’ve instantly become like the tone deaf grandfather at the dinner table.