Exactly, "My Dearest little Moonbeam" wouldn't have added much atmosphere if I had just read it, sometimes you just gotta listen to things to take in what happened, if that makes sense
Can't say that I agree with that. A performance depends on the actor and director, and what you get in even the best cases is their interpretation. Since you're not "involved" in it, hearing or seeing is a more passive action than reading, where your imagination has to play a large part. That's why you can get much more engrossed, immersed, and involved in a book than you can in a movie.
Note: I didn't say you DO get more immersed, only that you can be. Whether or not you do depends on the quality of the writing. Actors can make poor writing better, show how great good writing is, and all that, but in the end when you hear or see a performance, your in a much more passive role than you are when reading.
All that said, I liked the audio holotapes.