If there is music I prefer it to be off in the default state and give me the option to activate it.
Flash intro is OK by me as long as there is a skip option. If not I exit within 15-20 seconds (I'm known to be a patient man )
For the rest I don't mind that much as long as I don't have to download a number of plugins to make the site work.
Now all of the above is really irrelevant if I really, really want to see the site