This is the answer most people give to the question, "so, what kind of music do you like?" You scratch the surface just a little bit and it turns out that it's completely false and really they only enjoy a narrow range of music.
I don't even like this question because people just want that information to put you in a pigeon hole. What they're really asking is, "Do you like the same music I like, thereby being cool?"
It would be much easier for me to show people my entire playlist on my computer or mp3 player than to say I like so-and-so and the so-and-sos. If I mention one or two artists then suddenly that is my whole musical interest.
I like what I like. Just don't ask me what I like.