When I was still flying tours:
Pax boarding: "Waiting for a girl like you", Foreigner
Take-off: "Hot blooded", Foreigner
Coming to the first great view: "Requiem" plus another Sarah Brightman song
Coming to the second great vista: "Shine on you crazy diamond", Pink Floyd
Low level on the way back: "Ride of the valkyries", Wagner
Final approach after low level: "Dirty white boy", Foreigner.
When on a job where the pax wouldn't have headsets, on take-off for the first flight of the day, "China Grove" by the Doobie Brothers. After that anything went, although I remember someone looking at me with a funny look on her face as we dived into a canyon with me singing along with Boston's "Long time" at the top of my voice.