Wow, that's a lot of listening.
I have trouble with audio books myself. I find the static voice detracts a bit from my imagination developing mental images of the characters.
I tried a couple where there were multiple actors doing voice overs, so to speak, but let's just say they should have stuck to being waiters.
They are a great alternative medium though. Definitely a wonderful thing for the vision impaired, elderly or people with dexterity issues, long road trips or people who just enjoy the style.
I'm Riffing. People usually stop me when I'm riffing. Or carry on without me. That's also an option.