What boss fights SOUND the most interesting?
Yeah, I know player spell sounds and grunts drown out the boss emotes, spell effects, and music 99% of the time.
Personally, I have fond memories of C'thun's whispers. Would've been even cooler had they been more tied to mechanics during the fight itself (e.g. "your friends will abandon you" being timed to correspond with getting teleported to the stomach).
Which boss sound & music combinations have you liked?