The composer Frederic Chopin made his students learn music in B major first, since it matched with where his fingers laid on the piano

"Uncontrolled passions. Angry, Jealous, Fury, Despair, Burdened with negative energy. Prepared to fight."

Another rare key, this one sees hardly any use in both band and orchestra due to its complex key signature. This key does sound rather pleasant, which is unfortunate due to its rare usage.