Agree, and as much as I tried I just could never, ever, get used to the look of No Mans Sky. That color pallet is just ick, and so many of their ship designs were ridiculous too. Shame.
Halflife 2, yes, that was well done. Ultimately I think a good mix would be best, some planets and environments might have bright coloring, but the default everywhere else should be more realistic and gritty. That would make bright colorful areas stand out and actually be special, instead of a constant assault on the eyes.