I can see myself playing a looot of Brave Company when that comes out here (if?), but I'd probably get tired of hearing the same music over and over. I'd build my kingdom while listening to Portugal. the Man instead of the same game songs over and over any day
Living in the sprawl, dead shopping malls rise like mountains beyond mountains <3 Emily Haines of Metric is a GODDESS <3
Meh, I probably wouldn't use it. I rarely have the volume on on my portable systems because I'm already listening to my mp3 player, or I'm in a waiting room or someplace else where it would be considered rude to have the volume on.
Another knock on that feature (for me) is that I never know what mood I'll be in for my music, so I like to have all of it handy. Right now my collection is sitting at about 65 gb and there are no SD cards big enough to hold all my music and everything else for the 3DS.