I'm also now thinking about the change in my musical tastes since I came to Macalester and all the discoveries I've made... I feel like I can't just pick one band or musical group that is a favorite, because it seems like each semester I pick up a new obsession.
For example, the first semester of my freshman year, I was in love with the album "Perfect Symmetry" by Keane. I remember listening to that song studying for Astronomy while watching it snow. Great times. The semester after that was definitely my Phoenix semester. Sophomore year was defined by The xx and The Temper Trap (who are GREAT in concert).