I can't believe you people don't enjoy the in game soundtrack, you can listen to your own music at any time. I can see getting bored of it after a long time, but a week in?
I turned the ingame music off the 2nd day. Outside of the opening theme which is awesome, the rest of the ingame music is generic celtic-style music, not poorly done but not close to brilliant either.
Besides that, I prefer to play most games without their ingame music so I can get more of the atmosphere of the place I am, footsteps in the dark, the chirp of crickets, a wolf howl in the distance, etc., etc.
I'm sure ancient Nords didn't have Walk-Mans or iPods available for them to listen to music while they hunted. And I wouldn't think you could be very effective having a full orchestra follow you around back then, either.