use of modal harmonies
a variety of synth sounds
synth heavy arrangements
prevalent use of groove
If I mark this song as a favorite, it will add these attributes to what it's looking for in the music it plays for me. It's a very cool system which, of course, appeals to the gamer in me. It's also introduced me to lots of music I'd not have heard otherwise.
Unfortunately, the variety isn't quite what I'd like. Most specifically, I'd really prefer a bit more oriental folk and traditional music. Both my big writing project and my work on the Moldvay/Cook/Labyrinth Lord hack could use with some Dhol Project or Dead Can Dance for inspiration. They've got DCD, but nothing from the Dhol Project, and so the channel I set up for it, called Yulunga Radio, is turning into a trippy techno thing, rather than the exotic rhythm machined I'd been hoping for.
Still, finding some neat music. If you haven't tried it yet, I'd highly recommend it.