I've listened to audio books on my twice daily dog walks for years. In my experience, the key factor is the narrator. A good book can be completely ruined by a poor storyteller. Likewise, a book or topic that you'd normally not consider can draw you in by the quality of the narration. Also, auto biographies come to life if they're narrated by the subject of the biography. I'd recommend Frank Skinner's auto biography it's made even more hilarious by him reading it.
For me, audio books are an opportunity to "read" stuff I'd otherwise not have time to. From classics to new authors. George Orwell's stuff translates well onto audiobook and I'd give The Stone Man by Luke Smitherd a go if you fancy a sci-fi thriller that's completely off the wall. The superb narration alone by Matt Addis makes it worth a go.
Happy Listening