In fairness, I completely dislike some of Yamane's CV music, so I Arujo doesn't have much to worry about with me. But I agree, melody is important. No ambient music, please. If you want to rock out in a catacomb, then by all means jam those guitars and riff the bass in a dreary stage full of piled skulls and decayed corpses. The music in a game needs to make you want to play through it. Ambient music is good for games like Resident Evil or Metroid. CV's a rocking tunes type of game series with a little eeriness thrown in.
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There's a spider on my printer...