If you’re a fan of electronic music, you probably already know of Ishkur’s guide. If not, you need to go check it out. Like right now. (Don’t let the 90s interface and sound effects scare you away!)
Ishkur’s guide is like wikipedia for the hundreds of sub-genres that constitute electronic music. Each genre comes with snarky commentary, representative song samples, links to the parent genre it was inspired from, and the child genres that it in turn inspired.
I spent at least a couple of days on this the first time I discovered it. Totally worth it.