What's your favorite Raid Fights?

I'm surprised at the lack of discussion regarding how little people discuss their favorite raid fights (at least in comparison to WoW.)

So what are some of your favorites fights? (Because of Combat/Mechanics/Music/Aesthetics/Flavor)

Personally, I'm a huge fan of A12S. It was the savage Boss I beat when it was current. Both songs were pretty cool. The Mechanics in phase 2 were incredible, especially the time travelling phase). It wasn't as hard as A8S or even A11S, but I felt it was reasonably difficult and fun to play.

I'm also a sucker for Eden 12 Savage. I did this fight without realizing the 2nd Phase had a remix of The Extremes and popped off imediately. The mechanics were pretty interesting and a slight change of pace. Doing all the time-related stuff was super fun.