Man.... I don't get audiobooks. I don't think I engage that way and some part of me believes they are a disservice to any real writers (in terms of content not pockets) and are subject to choices made by the voice behind it. It's also odd hearing man use his woman voice anytime a female character talks.
I guess I could see it for nonfiction, but fiction is tough for me.
Jay, I struggled a bit with he transition to audio when I started facing challenges with my sight, but I think the persistence of exposure gets you to a place where you enjoy readers and their use of voices - some of them anyway.
Could also be that the reader(s) you've listened to already, sucks.
That said, beyond the barrier to entry reading poses to the sight challenged and how they can overcome it with audio books, I find they are really useful during times where your reptilian brain is doing most of the driving. The first day of my weekend every week I do laundry and put away dishes etc. Menial tasks that I hated doing got so much easier with the addition of an audio book. Once there was something added to the mix that my mind could focus on while my hands were full with monotonous tasks, everything became not only easier but more enjoyable.