I study opera in undergrad, and am looking at degrees in speech pathology for grad school.
Opera is one of those pursuits that really never gets old. Between learning the languages, the philosophies, the harmonic languages, vocal styles/ornamentation, physically perfecting technique/refining the body...it's, when done well, in my opinion, the epitome of live artistic expression. (I, too, studied a plethora of woodwind when young, but, as Architect stated, the returns decrease exponentially...)
My listening experiences really depend on the repertoire I'm workin through.
I love me some Ravel, Prokofiev, Wagner, Mahler, Berg, Schoenberg. I like studying/performing Webern, but I don't listen to much of his work. Same with Bartok (with the exception of Bluebeard's Castle). I also tend to sing a lot more lieder than I listen to, with the exception of Strauss.
I love early music, so Machaut, Tallis, Ockeghem, Palestrina, Hildegaard Von Bingen...they have a special place in my heart.