For several years I resisted having an MP3 player. Initially, I couched my resistance in not wanting to go with a trend. Then I hid it behind affordability. Finally, I could resist no more. Truth be told, I think I was just afraid that I would become addicted to the thing and never, ever hear what was happening in the world around me.
I have had a player for about six months now. I am very pleased with it. It affords me some privacy on the bus so the random idiot does not disrupt my morning calm, and the player allows me some escape while jogging. Using it on campus has been a more contentious issue for me. On the one hand, I like to know what is going on around me, and campus is a people-dense place. Bumping into people, not hearing what they say, or appearing totally non-attentive to the world around me are all concerns. On the other hand, there are times when I simply do want to block out the world. My patiences sometimes wears thin, and I am really not that interested in connecting with another human being.
At this point, the compromise I have made is to only use the player when I am coming to or leaving campus. When I am on campus and there to work, I do not block people or noise out — this allows me to be fully present and productive. As I arrive or depart, the player helps signal to my brain that yes, Greg, you are starting or done for the day.