Pillowmint

At my school, i was waiting for my lunch period to end so i played some ITunes on my computer. A boy in my class (who i happen to know likes Lil' Wayne, if it matters) walked over, listened to the first five seconds of Tristania's "A Sequel of Decay", and said "Wow, how can you listen to this?". Then he walked away.
What's the deal? Almost all songs sound at least somewhat different at the beginning as they do later on (and the song i was playing was over six and a half minutes long). I figure that his music must be incredibly repetitive and boring if he judges my entire taste in music by the very beginning of one song. Please don't say he is just a jerk, because other people have said about my music. And please don't say my music sucks, because that will not help anyone. Can someone please tell my why people think this way?