Sorry to bump an old thread, but i love audiobooks. I usually listen to autobiographies, usually of british comedians. Alan Carr, Michael McIntyre, Jack Dee. Its great listening to them recounting events in their lives.

Others I quite liked:
The Lovely Bones
Jurassic Park
A Walk To Remember

Im listening to the Hunger Games series atm

If anyone is interested in something Final Fantasy related in audiobook form, you might like this
http://www.youtube.com/watch?v=um_I9yYtXGk
or
http://www.youtube.com/watch?v=2WhcEaIn8cw