That's not the only way music majorhood has *ahem* changed me. I solfegg, a lot. I look at the different lines in church as we are singing hymns and it's all going in solfegg. After too much theory and dictation, I get really really excited about modulations (except when the TAB insists on doing one between each verse, really?! is it that necissary?)
I speak in another language. I've had roommates complain of it. I get together with music majors and we speak of dead people who (in my mind) wrote really awesome compositions, and then we pick it apart. It doesn't help that none of us even bother with full names, here's a mild example from a conversation in which I lost one of my roomies last winter: Last night I went and saw Concerto night with the Phil, some kid played the Rock 2 third movement.
That's a mild example... Kim and I lost Tia trying to discuss a German Augmented Sixth Chord and it's modulation. *grin*
Sometimes I love being a musician. It makes me feel cool.