On the 30+ not listening to new music...I've always been of the opinion that your creativity beings to seriously decline at around 30. You know more but explore less.
It reminds me of a conversation I had a few years back.
My friend was working on a startup tech company and wanted my advice on some things.
During the conversation I told him his core group of developers was too old. I knew most of them and I told him that he needed new fresh ideas, eagerness that can grow with him and the product that only young developers can bring.
And I said a group of 40+ year olds will never be as innovative and on the cutting edge as a group of 25 year olds.
I remembet that pissed him off when I said that...it pissed him off because he knew I was right. But I think my advice got a dozen new college grads their first job