First of all, if you want to read this book, get the audiobook! It's fantastic! Neil Gaiman reads it himself and does such a perfect job of it. Also, the main character is Scottish, so you get to hear both Scottish and British accents. What could be better? Well... David Tennant, since he actually is Scottish and therefore has a better Scottish accent that Gaiman. But also because he's David Tennant. 
 Anyway, back to Neverwhere. 
 Neil Gaiman weaves a delightfully dark, fairytale-esque story of London above and London below. It reads like a classic fantasy and while that can be dull, it can also be charming depending on the voice of the story teller. 
 Richard Mayhew had a great voice. I know I already talked about voices (and David Tennant) up there, but I mean this in an entirely different way. Richard Mayhew is the protagonist, and his own, personal head-voice was very clear in the writing. It wasn't first person narration, no, but his personality leaked into the third person and it was awesome. Ridiculous, witty, confused, and boyish. That's Richard and it made for a very entertaining listen. 
 I suppose that's as good a segue as any into the characters. As you all probably know already, characters make or break a book. In this case, they made it. 
 Like I said, Richard was delightful. He was our very unenthusiastic main character and very uninterested in adventures. That, of course, didn't stop him from having adventures. Poor dear. 
 The next main protagonist was the Lady Door, or just Door. She was great, by turns wise, young, and strong, she was a definite favourite of mine. She acted, she was clever, and she was a survivor. I loved her. 
 The Hunter was another interesting character. I never really knew what to make of her, though, and didn't find her hugely convincing. 
 Our villains, Mr. Croup and Mr. Vandermar were so, refreshingly, completely evil. This was not a book where the two thugs were trying to do good. No, they, quite definitely, just liked being bad. They were also the most quotable of all the characters, which is a plus. (For instance, if someone ever asks you what it is that people want, you can just reply: "Dead things. And extra teeth" to see how they react.) 
 And how can I fail to mention the Marquis de Carabas? I can't. He was... an entirely different kettle of fish. Possibly a tad bit overdone (okay, maybe a bit more than possible and a bit more than tad,) but loveable in his own way. 
 The plot was twisty-turny and could have been a bit better. I felt rather confused about what they were doing at times, or why they were in the place they were at other times. It seemed like Gaiman loved his world so much that he wanted to explore it more, which is great, but doesn't exactly make for a story that moves forward. Still, it's a cool world so I can't really complain. However, that will take this rating down one notch. 
 What have I missed? The plot was decent, the characters were excellent, the world of London Below was dark and chilling. The audiobook itself is wonderful to listen to. It's good, guys. It's good.