I put a genre tag on every track that I own but I don't use the Discogs genre information, because it is often either too vague ('Electronic') or just wrong.
In the past I tried to be _very_ specific with genres but I gave up on that. There are a lot of good tracks that sit at the boundary between genres and I got tired of having to look in multiple different places for those tracks when trying to find them. Now I divide it up based on what I would play together in a DJ set. Goa gets its own genre tag/folder because I try to play purely goa tracks in those sets, but the chill genre tag gets added to everything from psy-chill to dub to acid-tinged ambient, because I mash all those kinds of tracks together in my chill sets. The psytrance genre tag gets added to a wide range too (full-on, twilight, uk, ...) because if I am listening to one of those then I'm usually in the mood for all of them.