Although it’s entirely subjective, and boils down to the choice of the composer, pieces are written in different keys for a reason. Music scholars and composers have weighed in over the centuries about the characteristics of the different keys, and rarely come to a consensus. For F Major, several descriptions include words like ‘calm,’ ‘mild,’ and ‘contemplative.’ There’s also a bit of an association with rustic or pastoral scenes, helped along in no small way by Beethoven.
The Pastoral Key of F Major…
Here are the 11 selections used (click and scroll down to make them visible – mobile device users, keep scrolling down):