Hmmm - Áine has expanded beyond music - so:

Musical sounds: I like anything except nasty rap and modern jazz, which I would not consider music but I know others do. I love music that tells a story with words, whether folky or not (Mbo, I like opera too!).
Other, best sounds: My twins playing happily together when I'm not in sight. I especially like eavesdropping on them in the shower, playing whatever it is that they play... I try not to look, imagination is better than knowledge, as Einstein once said!