If there is a specific piece of music, then post a link. Also I am interested about the influence of environment...so if you could add the favourite music of your parents and siblings, their personality types, and when they were born, then that would be good as well.
My favourite composer is Beethoven, and if I have a favourite piece it would be his 3rd symphony - the Eroica:
My dad's favourite piece of music is Rachmaninoff's 2nd Piano Concerto, he likes Russian Romantic music. He is an ISTJ, born in '61. Whereas my mum finds Classical music "loud" and "horrible", but she likes John Mellencamp (and the Dixie Chicks ). Her favourite song is "Small Town". She is an ESFJ, born in '64. My brother...well, it's hard to really know because it changes every day, but some kick ass nigga shit hitting dem hoes mothafucka. He is an ESFP, born in '95. (We are complete opposites in almost every way.)
My dad introduced me to music and encouraged me to play the piano when he realised I have some innate musical ability, so I am lucky in that respect. However I never had any theoretical training until I started university (and haven't had that much, really) so have to pretty much do it intuitively.