Ishkur's Guide To Electronic Music is a fantastic site. It's jammed with tons of info, but it's fairly easy to navigate... yet... you can get lost in that world for hours. I used to refer people to this site quite a bit, back when my job required me to give good reference points...
Surprisingly this site has been around for a long time and is a really informative tool. The first time I saw this site, I got lost for a good 3 hours. :lol: The sonic guide lets you fill in the blanks when words fail to describe, and whoever knew there a subgenre called Gloomcore! I'm not keen on genrefying things into oblivion but it's still all very interesting.