Neil Gaiman has written a lot of different books. His writing has been hit-or-miss for me, but nothing that's truly middle-of-the-road average. That was until I listened to Neverwhere. I appreciate how Gaiman narrates most of the audiobooks of his works that I've listened to so far, and Neverwhere was in line with the narration quality I expect from him. However, the content felt so mediocre that I honestly wouldn't have been surprised if it came from any other different British authors like Terry Pratchett or Douglas Adams (both of which are talented writers, mind you).
There's a distinct flavor of British comedy that comes through in the absurdist naming of characters and places in Neverwhere. Perhaps it's why I felt this book was so generic. It's your classic "Institutionalized" story where a man has (what seems to him) a stable life, only to have this life upended by a fantastical parallel world introduced by a character he eventually ends up falling in love with. While his interaction with this "London Below" made the main character invisible to his old life, he takes far too long to realize that the status quo he seeks is no longer desirable to him.
Maybe it's that I don't connect with these kinds of stories. They just seem so "meh" with bland characters trying to go back to their bland lives that it's always so obvious to the reader their life would be so much better in this new reality. Of course, I probably wouldn't pursue this fantastical new reality given the choice in my own life, but that's beside the point. Neverwhere contains all the trappings of this type of story, which is certainly entertaining for a bit but gets annoying the longer the main character refuses to change into their new selves.
An average institutionalized story with average British humor, I give Neverwhere 3.5 stars out of 5.