I have been using Audible for around 8 years now, and have hundreds of audio books. Without a doubt, the DCC series is the best.
Why? Full cast audio, a hilarious story, great character development, and an extremely whimsical overall feel.
This series (currently at 5 books) is possibly a MUST get for anyone, even those who are not familiar with LitRPG. I have shared DCC with at least 6 friends, including my 72-year old dad, and he loves it too!
Also – shameless plug for Matt’s Etsy store (Collageorama) where you can hopefully find a personalized, signed copy of DCC. (I got mine last week).
I am now a diehard fan of the DCC world!