The dark and ominous TTK tracks and the orchestral ROI tracks remind me why I stuck around for so long. "Regicide" is one hell of a track! Not to mention "Iron Temple" and "Ad Victoriam" But the greatest piece of music for me is when you grab the sword while fighting Crota. That combined with being the swordbearer gives me the adrenaline to to almost anything the game can throw at me.