For editing genre i do this:
1)Use a view with album artist in the fist pain, album in the second and genre in the third.
2)Select one or more album artists at a time and edit the genre manually in the tag window.
3)Select soundtracks and other various artists then edit the genre on each album.
That is all.
Why do i do it like this?
-Tagging databases(in general) will have many different genres for the same band, and
manually editing will keep it consistent for each artist.
(this is assuming they didn't radically change there music style mid career)
-Many artists fit into multiple genres so its best to manually choose one.
-I know the genres of the music I listen to better than the databases
-Databases(in general) are terrible for years and genres.
-I can use a typical genres for all my music like:
Alternative, Rock, Classical, Techno, Hip-Hop, Punk, P-Funk, Industrial, Country, Pop, Reggae, etc.
-I can avoid ridiculous genres like Avant-garde metal, New prog, Rock and roll, Retro Acoustic Steel Guitar, etc.
90 percent of my music is tagged as alternative. Keeps things simple.
For oldies(60s-70s) i use rock.
Country, techno, and hip-hip are far and few between so it is easy to single them out.
Pop is assigned to ALL my girlfriends music because its terrible and i can exclude Pop from all my views.