Honestly, I listen to enough different genres that I have no idea what people think would be normal or not for me. But I would guess the biggest surprises would be Master Boot Record and Keygen Church projects from the same person, and Lingua Ignota.
MBR is rock and heavy metal with stylings from speed metal and New Wave of British Heavy Metal, but through a 16-bit sound font, so it sounds much like a Super Nintendo game that had the soundtrack composed by Iron Maiden. Keygen Church is very similar, but the compositional focus is much more religious and Romantic in nature, as well as using a lot of organ and choirs as well.
MBR - BIOS
https://www.youtube.com/watch?v=oV_pQcOrY2Q
Keygen Church - La Chiave Del Mio Amor
http://https://www.youtube.com/watch?v=5rIuH_Ng2bM
Lingua Ignota was a project for Kristen Hayter to make music and deal with an abusive relationship. As another one person project, she makes what would be called Neoclassical Darkwave. The first part of that genre being new implementations of chamber-style music or the typical instruments, and darkwave being a more sinister and dark version of new wave.
I heard the albums Caligula and Sinner Get Ready and they blew me away. As a metalhead, I've listened to a lot of extreme music. At a certain point, a lot of that stuff just becomes silly with how over the top it is and how it tries to shock you. But both of the Lingua Ignota albums I've heard were heavier than any other record I've heard. They are not for the faint of heart, but they are an incredible listening experience. I'll leave a review since I feel like you really need to experience the whole album yourself.
Sinner Get Ready Review -
https://www.youtube.com/watch?v=g6S0XHGKzUU
I've also gotten into hardstyle recently for a much different shift (maybe this would be what GCers would be shocked with)
Rooler - WELCOME 2 DA RECORDSHOP -
https://www.youtube.com/watch?v=iTQxEe9ntFo