"Great" is in the eye of the beholder, but I put a lot of thought into my website. I began with a design on paper, listing all the different audiences I wanted to address on one sheet and all the capabilities I wanted to promote on another. I let those pages collect ideas for at least a week before trying to sort and organize them. Then I organized the main tabs around how I figured the audiences would want to connect to the information--including myself! I like having a website where I can show people stuff without having to apologize.
I agree with others that having music blaring out by default is just dumb: how is anybody to know whether the person clicking the link loves rock or hate it, loves guitars or hates them, etc? The studio should be both a prepared environment--ready for anything--and a blank canvas--ready to be anything. A specific musical selection works against that in the strongest possible terms.