Favorite what? Classical pieces/composers? I really love Chopin, Beethoven, Telemann, Corelli, Gesualdo, and de Machaut. I have been on a clasiscal binge/quest: listening to all the eras in chronological order this summer; + my last.fm account is relatively new so my charts are a little screwy.
Considering that you also like Cocteau Twins, Sigur Ros, the xx, Slowdive and M83, please also listen to Ummagma (our music sounds like these & other bands melted down into a sweet Ummagma cake) at www.lastfm.com/music/Ummagma or FULL ALBUMS at http://ummagma.bandcamp.com - Good vibes to you from Ukraine!