Ok, I had just finished this entire blogpost, with images and a long story on backdrops and then my computer crashed. So I lost it all! Here's a shorter version of what I just wrote and posted.
Let's just say that I learnt a lot during this exercise :-)
Here's an image that I took with my girls. It shows how despite the busy background that with a shallow depth of field, the focus can still be on the subject, while remaining the beautiful colors and a sense of the surroundings.