My demographic: early 30s male upstate New Yorker, lower-middle class.
My favorite genres:
20th century music, early music, musique concrète, Berlin School /Deutsche elektronische / kosmische musik, bebop, cool jazz, hard bop, free jazz, third stream, music for films, pre-World War II ragtime, synth pop, big band, new wave, fusion, funk, rare groove, future Balearica, downtempo, shoegaze, minimalism, future-jazz, chillwave/blisscore, and most ambient subgenres (psybient, ambient techno, drone, etc).
Favorite Labels:
Blue Note, Deutsche Grammophon, FAX+49-69/450464, Ohr, Brain, ECM, Prospective 21e Siècle, Mute, ESP, Nonesuch, Vertigo, Command, XL Recordings, NinjaTune, Impotent Fury, 4MenWithBeards, MusiconVinyl, and Mobile Fidelity Sound Labs.
There is no shortage of studies on the musical preferences of various demographics.
Here is one for example. What sort of information are you looking for?