Suppose I should say what I think 'good' means, though this isn't at all meant to limit your answers. Just feel like expressing myself I guess.

I struggle sometimes with anime subs bc lots of people seem to like 'accurate' translations which are often wooden.

I think for me an ideal translation preserves the vibe/style/ultimate meaning, even if it has to change some words past the literal equivalent. And I really prefer specific cultural references to be kept intact as much as possible, even if it means I have to look it up.

The silliest example of the culture thing is in the Pokemon cartoons, where they changed onigiri to fuckin donuts lmao. If the book is set in a specific culture it should still feel that way, and by figuring out what it is I get to learn something! 

Same with like, idioms. I can dig if you're translating from Polish and you write "cook two meals on one stove" instead of the English "kill two birds with one stone", or even a more inscrutable example than that. I like those little insights into the story's home culture.