I actually dislike most adaptive game music because most games that use that term just use it for having combat music that swaps in dynamically when you're near a hostile mob.

The games where the music is just a combination of things based on what's going on, however, are fucking dope as hell. It's not something I see (er... Hear) all that often though which is disappointing.

It's awesome when you notice that you can affect the music that's playing by jumping or doing specific attacks/actions or based on how many/what kind of enemies are around, etc and not just "the music is this now because you're fighting."