Zariman and Sanctum.
Back when I came back and was catching up with New War. I had no idea about Angels of the Zariman. Someone mentioned it in QnA and I was absolutely dumbfounded. I stopped when Railjack dropped. I got back in game when Voruna was introduced. I have no idea why no one went nuts when Angels of the Zariman is mentioned.. because boy I DID. The time I stopped playing, Zariman was mentioned only in lore. I still go around Halaku and looking at the angel shapes on the tile or in the dead end rooms (that I wish had more to them than just dead ends). The clutter used to hide in and make shift hidden sleeping spaces. Melica mentioning names of other children along with Rell!
Now Sanctum. SANCTUM. The huge bodies there. The glowing scribbles on the walls and the Indifference! Wow. But my absolute fave is the sound. The murmurs, banging, the music and Tagfer's lines. I found Chains of Harrow funny because the "rap tap tap" sounded so weird. Then Sanctum dropped and you hear the "rap tap tap" for real.