Huh, bit of an odd topic, but interesting to think about. And I do have a song that would be nice:
It's called "Wings of Destiny" by Rhapsody of Fire, formerlly known as Rhapsody. It's a nice gentle ballad-esque song in the middle of a power-metal concept album. At this point in the story, the protagonist is riding on the back of a dragon, flying (at night) over the Enchanted Lands, which he has been destined to protect from the forces of Darkness. The lyrics are his thoughts, about his he wishes he could just forget about all the troubles of the world and just lose himself in the beauty of the Earth.
I could easily see Pterano flying in a quiet night, over the Great Valley, singing this quietly to himself. The lead singer does have a similar quasi-operatic voice too.