I agree with everything that you've all said! My something is one people don't usually mention, but in DH when they go to see Xenophilius and Harry sees Luna's bedroom with the painting on the ceiling! I was so excited to see that, because it's something that shows that Luna really appreciates their friendship. She evidently hasn't had many friends in the past and I love that we get that brief little look into her life. Plus the effects would have been awesome!