Suggestion:

I do think this is a very good feature and I will trawl through my collection on rainy days to update .
One of the categories is "Country" we could have "Country & Western" as in Yee Haw type music - then "Country Rock" as in early Eagles and Linda Ronstadt efforts.

Nice feature - will there be scope for Mods to add new genres.

Like kab I am thinking for sub genres for some of the main genres such as Jazz: Bop, Hard Bop, Fussion etc.

A great addition, just an enquiry on how many you would like members to do in a batch, i.e,i've just done a batch of 25 in one go, is that too much? i.e, does a MOD have to check and OK each Genre entry?, would smaller batches of 10 be better?, or do you want larger batches?. I've just done some Electronic one's and it takes a little while, is there perhaps a way to "blanket genre" artists in one go?, i.e it would save a LOT of time and effort if you could use Genre 1 for bulk classifying, i.e, all the Rolling Stones as ROCK for Genre 1, then, Genres 2&3 could sub-genre by individual album depending on content, i.e, a Stones album with Rock as Genre1 might have Blues as Genre 2., but Rock would be the main genre for that artist, just as Electronic would be for Tangerine Dream, or Folk for Fairport Convention, etc. etc.
Obviously, if you were alble to do Genre 1 as bulk, then it may be better if the Moderators decide on the Genre 1/main genre for any artist with 100's of entries...
(Just a thought to speed things up/might help with the enormous backlog)

I would like to see "Opera". or would that be Classical + Vocal?