Interesting question ... One bit of music I noticed missing was the roar of the engine - powerful sound to go with air horn, siren, radio. However, as sick minded as I am, one picture that popped into my head was tooling down the road with a crew air fisting to the chorus of Bon Jovi's, "Livin' On A Prayer". But, since risk factor of doing something like that - outside of the entertainment field - would be astronomical, that would be a negative on the music.
You're not too far off with that comment. We've pulled up a few times on a job that was not quite yet ready to take off. Then the guys on the backstep start bitchin' at the driver for getting there "too fast".
I agree you shouldn't have the radio on when responding, but Jimi Hendirix - All Along the Watchtower is not a bad choice if you have to listen to something!