I seldom listen to rock or pop music or any other genre of the last 50 years or so.
My favorite music is that of Rachmaninov, Verdi, R. Strauss, Barber, Handel, Vivaldi, Bach, Corelli, Palestrina. Renaissance, Baroque, Romantic, and Late Romantic or Neo Romantic. Classical Era bores me, as does Modern Era.
My favorite performers are Leontyne Price (soprano), Howard Shelley (piano), Gil Shaham (violin), Truls Mørk (cello), Nathalie Stutzmann (contralto), Trevor Pinnock (conductor and harpsichordist).
Favorite orchestras include The English Concert, Wiener Philharmoniker, Berliner Philharmoniker, The Philadelphia Orchestra, Royal Concertgebouw, and John Eliot Gardiner's Orchestre RĂ©volutionnaire et Romantique.
Favorite choirs include The English Concert Choir, The Sixteen, The Tallis Scholars, and The Monteverdi Choir.
As far as I know, there isn't all that much of my favorite music available for download on the internet, other than what I already purchased years ago. Leontyne Price, for example. There are some live performance bootlegs available through the OperaShare group on yahoo, but only her Christmas album (the best Christmas album ever recorded in my view--Leontyne Price, with Herbert von Karajan conducting the Vienna Philharmonic) appears on demonoid. They do, however, have lots of lossless versions (mostly flac) of Bach and Vivaldi, but I already own my preferred interpretations on CD.
I don't know squat about usenet except that it exists, so perhaps there's more there, but I wouldn't even know how to access it to find out if there was anything worthwhile. I know the discography of all my favorite performers, and there are only a few things I don't own, and that's simply because they were never even released on CD.