Oh boy playlists! Those are our favorite things ever. All of these are fictives. I, Kieran, absolutely love freaky old horror Vocaloid music and I feel like the fandom doesn't really expect that? In the playlists of myself I don't really see ANY Vocaloid music, really, and especially not any horror ones. Also a huge fan of metal, especially Utsu-P's music.
Emmet really likes Lemon Demon music but refuses to add any to his playlist because of the way people view playlists with Lemon Demon songs on them. (Gloria [host's kin] doesn't feel the same and has Niel's entire discography on its playlist, which its playlist in full would take 3 days to listen to without considering the ungodly amount of ads Spotify plays.)
Blue Oak listens to a lot of Vocaloid music and ethereal, angelic style music. Her favorite Vocaloid songs are Dysphoric by angelbrained and Angel 92 by Maretu, which I think most Pokèmon fans would get really confused by. (We hate Maretu as a person, we just like his music.)
Snowball (BFDI) really likes artists like TV Girl. Not sure what to call his favorite genre, he listens to slow emotional music I guess. He's definitely not the rock and roll/metal listener that the fandom probably sees him as.