Sir Figs of Yore

I'm no guru on music theory or anything, so I'll just say this: This was music to my ears. This got my energy going and I can't get it out of my head. Nothing really seemed too out of balance to me (that is to say, my ears weren't bleeding; they were revelling). I felt the melody was quite varied, and like djPretzel says, it's long without feeling stretched out or repetitious. The only thing I'm afraid of is that if I put this on CD, I'm going to crash while driving due to getting the urge to drive at supersonic speeds.

I will nominate Improved Abazigail and Improved Demogorgon in Baldur's Gate II: Throne of Bhaal. I went into both battles fully powered up by augmentation spells. They seemed to be either extremely resistant or simply immune to most spells, and Demogorgon summoned fairly strong demons every 10 seconds it seemed. Took me three and six straight hours to take down Demogorgon and Abazigail down, respectively.