Music

If you're able to listen to music at your computer, you might want to check out Pandora. Plug in one artist or song and it starts playing. It plays your selection, then similar music. It then learns what you like by your rating of the songs playing. Other sites "learn" what you like but I think Pandora does a better job of it than most. (eg Amazon - that somehow thinks I'm interested in romantic novels, and tivo - that is pretty sure I'm gay)