Great post from @schubert, as always. J.S. Bach's music is particularly profound, and was written to glorify God, not Bach or the performers of his music. I was introduced to his music in the early 70's by a college music major musician I had played in a band with in High School, but really got into him and the other Baroque composers when the Original Instrument movement took off. Hearing the violin and other string instruments' notes played without excessive Romantic-era vibrato is such a joy!
I also love Bluegrass fiddle, and find a lot of similarities between that music and Baroque-era Classical. A theme is played, followed by a variation on it. Lots of harmony and counterpoint, which I love. And the bass parts in both musics employ the use of inversions (the notes played by the bass are not the root of the chord, but rather another note in the chord), one of my favorite musical sounds. James Jamerson, bass player on most of the 60's and early 70's Motown recordings, used that technique a lot (give a listen to "What becomes Of The Broken Hearted"), as did Brian Wilson in his Beach Boys recordings starting in 1964.