Exactly! This is why I have a vast music collection too.
There have been a lot of studies on the effects on the brain of various music keys. Pythagoras developed a system for identifying the effects and taught his followers about it in “secret teachings.” Some music soothes, some excites, and some can literally drive you mad and make you highly aggressive. It’s fascinating stuff.
I try to avoid Eb minor and Bb minor!
Here’s a summary about Western music keys:
"... descriptions of keys from various writings ... (quoted from a book by Rita Steblin):
C Major:
"Completely pure" (Schubart, 1784)
"Cheerful and pure" (Knecht, 1792)
"State of nature, virginal chastity and purity, lovely innocence of youth" (Heinse, 1795)
"Naturalness and nobility" (Gervasoni, 1812)
"Cheerful and pure; innocence and simplicity" (Weikert, 1827)
"Simple, unadorned" (Schumann, 1835)
"Concerning the physical expression of this key, it appears to be completely pure" (Schilling, 1835)
C-sharp minor:
"Penitential lamentation, intimate conversation with God" (Schubart, 1784)
"Despair" (Knecht, 1792; Schrader, 1827; Weikert, 1827; Ebhardt, 1830)
D major:
"Gay things and grandeur" (Rousseau, 1691)
"Joyful and very militant" (Charpentier, 1692)
"Pleasant, joyful, bright, songs of victory" (Masson, 1697)
"Songs of mirth and rejoicing; grandeur and magnificence" (Rameau, 1722)
"Martial ardour" (Hawkins, 1776)
"The key of triumph, of Hallelujahs, of war-cries, of victory-rejoicing" (Gathy, 1835)
Eb minor:
"Horrible, frightful" (Charpentier, 1692)
"Feelings of the anxiety of the soul's deepest distress, of brooding despair, of blackest depression, of the most gloomy condition of the soul. Every fear, every hesitation of the shuddering heart, breathes out of horrible Eb minor. If ghosts could speak, their speech would approximate this key" (Schubart, 1784)
E major:
"Uplifting" (Junker, 1777)
"Bright" (Gretry, 1797)
Bb minor:
"Gloomy and terrible" (Charpentier, 1692)
"Mournful songs" (Rameau, 1722)
"Preparation for suicide sounds in this key" (Schubart, 1784)