In a story, do you prefer characters that don't kill for justice, such as Batman, or do you prefer they just get rid of them completely?

I'm writing a story and need to decide whether the main character is justice based or if he is more morally grey.
So far, the character in question has a chaotic, good personality.
Which would you prefer to read about?
Morally Grey
Justice
Select gender and age to cast your vote:
In a story, do you prefer characters that don't kill for justice, such as Batman, or do you prefer they just get rid of them completely?
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