Steven Universe - And the other gems saw her boobs and thought they looked fine too

Completely understandable, even some men I know liked boobs so much they have their own pair

She does appear more human than any other Gem we've seen. She has a natural skin-tone, wears a dress instead of any kind of uniform, and has more detail in her hair than any other.

After meeting humans and deciding to fight for them, she probably changed her appearance slightly to better reflect them.