Pandora

Some or all of you may have heard of Pandora internet radio, another site that generates a music stream based on your interests. Rather than basing the new songs on what other users listened to like last.fm, it uses the Music Genome Project, which breaks down songs or artists you enjoy and presents artists that have a similar sound. You can ask why they're playing a certain song, and they'll break it down that it features, for example, use of modal harmonies, a tight kick sound and a highly synthetic sonority.

As you listen to a certain station, you can add more artists, and give songs thumbs up or thumbs down to further tweak the songs played. It can take a little while to get a station that plays music you enjoy, but it's worth checking out.