I am obsessed with my kindle, and am an avid reader, but there are a lot of activities i can't do while reading, like walking across the street, or going to the gym...i was thinking of getting an Audible account so i can switch between reading and listening on my kindle, but i didn't want to enroll in the monthly membership unless it's really worthwhile! i buy a lot of kindle books, but I don't have to pay a monthly fee for the kindle. I was just wondering if the membership is worth it on Audible.