Hitchhiker’s Guide is more like a sci-fi fairy tale, though without any sort of moral teachings or any life lessons outside of “Don’t Panic”. It’s just characters going from one improbable situation or interesting conversation to another. Outside of maybe Marvin the paranoid android and Zaphod, none of the other characters are particularly interesting, they’re just sort of blank vehicles to keep the story going or Arthur as the cabbagehead/Watson-esque character to ask questions for the reader.