Flac folder #/Artist - year - album title/Artist - Album title - track # - Track title
Have over 1000 discs cataloged this way. Previously I had my CD collection as alpha by artist and chronological by original release date within artist, so this winds up being nearly identical
the .oggs for my karma have the same structure, except they all fit on a single HD.
Edit: don't have many VA discs, but for the few I do, I've put "soundtrack - movie name" or "various artists" for the artist title, and "artist - track title" as the track title