Haven't listened to ingame music unless absolutely love the soundtrack in years. I remember combining my Dreamcast's visual input with my PS1's audio input, and playing CDs on my PS1 while I gamed on my Dreamcast/PS2. On Xbox, I remember getting so excited when DOA: Xtreme Beach Volleyball announced it would be one of the first few games to allow you to play your own music over the soundtracks. Ever since, if possible, I set my own mood for each genre of game.