Doesn't bother me really. If I'm watching a lot of videos one after another I find myself saying "come on intro hurry up already". Otherwise I think it's not bad. The music does not really bother me, what is it about the music that bothers you?
I think if any changes were to be made I could see a selection of a few different intros, each one with its own unique design/sound. I am really glad that there are no lyrics or a sing a long, that would drive me nuts.