Something I hate in fantasy and Sci-fi is entire races/species that are evil. And when killing those creatures or subjecting them to terrible things is seen as a heroic act.
Things like orcs from a lot of fantasy media, or Drow from Dungeons and Dragons. Or the Wraith from Stargate: Atlantis, or in parasites whose name I can't pronounce from Stargate SG1 (There's a little nuance later in the series but not much).
I was watching Stargate Atlantis on Hulu, and kept wanting to learn more about the Wraith antagonists and hoping to see other sides to the species, but it never happened. And then the series of episodes around what was done to the Wraith referred to as Micheal. How they experimented on him and betrayed him, several times, used him and eventually killed him... And that episode ended on a triumphant note after the settlement him and many others were killed. They REALLY could have used that to really get into Wraith minds and the attempt to tackle the morality of their actions, and an attempt was made. And ruined the instant they ended killing them all on a triumphant note as if it was heroic. They tried to tackle the moral issues behind it all, but it was so surface level, and it still ended with feeling like the writers were saying "This race is pure evil and we are keeping it that way :)"
The thing that really honestly annoyed me the MOST was how the Wraith not being human was what was blamed for them being evil. How making them "not evil" was using a retrovirus to take out their non-human side. They were a race created for the show just to be evil, and nothing more. They weren't really given a chance to be anything else, when playing with the basic concept of what they were and how they worked could have been so interesting.
I would have LOVED to see some of the Wraith realize that their hunting and feeding on humans was snuffing out conscious minds and more exploration of what they must do to survive and how it effects their mind and society. It would have been so interesting without making them less threatening.
An entire species can't be pure evil. I would have LOVED to see more exploration of their minds, their societies, maybe some groups trying to find better ways to do things. But the way they were portrayed makes absolutely no sense to me, I just can't really figure out HOW they could have become space faring while basically being aggressive predators that barely even get along with eachother. But the shoddy worldbuilding behind them is a whole other subject.
Anyway, all rambling aside, show me nuance! Show me how orcs live and how their society works. Don't make them evil, make them different! Show how differences in beliefs and ways of life might make them clash with other species or within their own species. Show me individuals in the orc armies working under a warlike leader and how it effects them and their motivations and what they are taught. Show me inside their minds!
Show me an orc warrior who looks over the destruction the army they are a part of has done, and feels regret when he sees the bodies of innocents killed in their onslought, even if he ends up rationalizing it and his loyalty to his army doesn't waver. Show me the fight between the ideals he was raised with, and the reality of the actions of his army.
With races added in to be antagonistic, give me reasons why! Explore that race, their biology and psychology, their culture, their side of the story! Show outliers, show general society outside of the warriors fought by the heroes of the story. Show us civilians. Members of a race can absolutely be antagonists, but don't make the entire species evil because that's convenient for you!
Anyway, rambling aside. I haven't finished Stargate Atlantis yet, which spawned this ramble. Here's to hoping they DO actually show more nuance with the Wraith. If not.... I am very tempted to make an AU that actually makes the race actually make sense, even if just for brief exploration because the species has a lot of interesting potential.