15 hours of battery life. Playlists. Won't hurt when you crash with it and break it.
I got the 3rd gen Nano with some buds with remote control.
I just set up a bunch of 5 hour playlists, stick the thing in my interior pocket and pause/play/skip with the remote. Maybe I pull it out once a day at lunch and change to another playlist.
Bought a cheap hard plastic Belkin case for $10 and many spectacular spills later, not a scratch.