I love both audio books and e-books. I've been a member of audible.com since 2001--and have lots of books from them. Lately, I've also been downloading a lot of different audio books from my local library.
Like others, I listen to audio books during my commute,exercising, and when doing housework, etc. I also listen to them when I'm in bed--I set the sleep timer on my mp3 player for 15 minutes, and usually fall asleep before the book stops playing. by setting the sleep timer, I only have to go back a few minutes in the book to find my place.
I also really enjoy reading--and love my new Sony 505. I do find reading when waiting in line much better than listening--it's much easier to deal with interruptions, and people seem to interrupt less when I'm reading as opposed to listening.
I'd hate to have to choose between the two, as both are vastly different experiences for me. I really do enjoy curling up with a good book, but listening can give me just as much pleasure.
dordale