Why do you learn new languages?
Rammstein. This reason why I learn German.
Ich lerne Deutsch weil ich hier in Deutschland gekommen bin um mein Studium zu studieren. Mein Studium is auf English, aber es ist sehr schwer wenn man hier kein Deutsch spricht. Ich bin auch ein großer Fan von Rammstein.
From a musical point of view: Schiller! (of course the songs that has German lyrics and not just instrumental or English) But the main reason is hoping to get admitted to a German university (which is taught in English) but be able to communicate with local people.
Goethe's Faust is the reason why I am learning German. Also, it's the most beautiful and sexiest sounding language to me (though it's completely opposite to most people) =)
I want to learn new languages because I'm a big traveler. It helps to know the country's language you're traveling to. Plus, it's really neat to be able to say something many different ways.