I love this one. I think I like it more than Time Crash that I put up last week. And I love it partially because as one of the commentors on the Youtube link says: "The Doctor can save the universe but he sure can't write music!"
But I also love it because I love the audience. I love the looks on the kids' -- and a good chunk of the adults' -- faces. For the space of those 6 minutes and some odd seconds, the Doctor is there. Talking to them. And that is just awesome.