never understood why some people call level grinding "training" when there is no real training involved but anyway, i hardly ever listen to anything but the game music... i've never found the game music to be boring but on the rare occasion, like when Haley's Commet passes, i'll get the urge to listen to some CD and then i'll just turn the ingame music off and play whichever CD is gnawing at the back of my mind since it'll be a while before i'm moving on to the next story line or area...