For me, it depends on how important the environment is in a certain moment in my episode.
In this short comic I wrote a while ago, the environment played a large role in the premise of the comic, and so I put a lot more time and effort into it.

In scenes of nothing more than conversation, I tend to use less detailed if not no backgrounds. I feel like it emphasizes the dialogue a bit


I generally keep the backgrounds simple using softer colors and simple drawings. I really enjoy drawing detailed scenes, and I'd like to include them more in my series, but I often don't due to time and I can't really say that I'm particularly good at them
From a reader standpoint, I'm enticed by detailed backgrounds (though they're lacking in my own work ha). I think they play an important role in comics, especially those that focus heavily on worldbuilding.