Out of all the villains, she was the most developed. Daughter of Thanos, not his favorite, evil to the core, hated her sisters, but Gamora the least...
True, not much, but more than Ronan and more than Thanos.
That was annoyed me though. She had so much potential as a character. I really thought they should have spent more time on her character. Out of all the "bad guys", she was probably my favorite.
Yondu was more of antagonist but I loved the character.