It can be a bit of both. I like hearing all suggestions. My cousin and I have always been into some kind of audio. We usually have it planned out ahead of time when we are getting something new, so we would always talk about what that "First Track" will be. Back when we were into car audio and big subs it was usually something like DJ Magic Mike - Feel the Bass, and once we were older and doing more in-home stuff it was songs like Rush - YYZ that we loved to play first.