I have nothing against flash. If used properly it can greatly enhance the appearance and functionality of a website.
About sound... It depends. While I do listen to music when I'm in front of the computer, music on a web page doesn't bother me very much if:
- a "mute" button is present and easily noticeable
- the volume is not too high
- the tune is not annoying (highly subjective thing, I know)
- the quality of the sound is good.
Music can be a plus if I like the tune.
