It looks OK on the surface (hopefully it's not too depressing as someone else has said) but why is everything so clean? Why do everybody's clothes look brand new, like they just came from a store? Nothing is scratched up, the dirt looks superficial. Why does the outfit of the ghoul not even look dusty, let alone weathered and scratched up?
Even background objects look like they have just been power-washed - e.g. look at the airplane cockpit in the Megaton-looking shanty town. It's cleaner than some airplanes we have flying today, despite being 200 years old and surviving a nuclear apocalypse.
A lot of Fallout is a mix between 50's sci-fi and western aesthetic. The sci-fi things look OK, but they forgot the western part. There is no dust, no dirt, everyone just went to a stylist a few hours ago, and then got their clothes fresh and from a store.