Have recently switched my workflow over to MP3TAG and have recently completed curating my audio library.
I'm in the process of revisiting the "Genre/Style" meta-tag in an effort to ensure that it is a simplified as possible and adheres (albeit somewhat) to standardization. I figure I'd post some links - most of you probably have already - that I found in case other newcomers to the community are looking for them.
I also have separate text file lists that I can upload in case someone can use them in their workflows.
https://www.allmusic.com/genres https://blog.discogs.com/en/genres-and-styles-list https://musicbrainz.org/genres https://rateyourmusic.com/genres https://music.apple.com/us/genre/music/id34 (https://itunespartner.apple.com/en/music/guides) https://en.wikipedia.org/wiki/List_of_ID3v1_Genres http://id3.org
Multi-Genre/Style Meta-Tag Editor Handling [Omit Quotes]
Foobar = "[genre] / [genre] "
iTunes = single genre support only
KODI = "[genre];[genre]"
MP3Tag = "[genre]\\[genre]"
Windows Media Player = "[genre];[genre]"