These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Awesome Music: "Not in Love" definitely counts. Robert Smith of The Cure on vocals, Alice Glass' breathy ones joining in at the bridge, and Ethan Kath's newly polished production skills really make it for this one.
"Alice Practice", the song that introduced them to the world. Basically what would happen if you captured a chiptune band and a female-fronted hardcore punk band and made them fight. It's glorious.
Also happened after the release of "Not in Love", as many people didn't realize it was originally a Platinum Blonde song.
Hell Is That Noise: There's that strange noise that repeats throughout "Plague" that sounds almost like a warped whale song. It sounds a bit like CC watched the trailer for Prometheus and went home to make a song.
The entirety of "I Am Made of Chalk".
Nightmare Fuel: Once again, "I Am Made of Chalk". It's probably one of the weirdest songs they've put out, consisting almost entirely of modulated wailing and screaming. The amount of speculation as to just what the song means makes it reach levels of Mind Screw equal to the work of Swans.