Then what would it be? And where and when, exactly, would it play?
I'll start off with some from La-Mulana:
Mr. Explorer
Where/when it would play: While exploring the Felaryan jungles, of course. A perfect theme for adventuring.
Fearless Challenger
Where/when it would play: Inside the Mysterious Temple. Perfect for a trap-filled ruins structure, this theme is.
Curse of IRON PIPE
Where/when it would play: Along the rapids of the Jewel River or Chordoni River. This theme really makes you think of rushing water, huh? (Now I have to go to the bathroom...)
Inferno
Where/when it would play: Inside Mount Vylkren. A very catchy fire theme, huh?
Treasure Sealed Off
Where/when it would play: In
Hell! Bwahahahahahahaha!
But seriously, this is quite possibly one of the most
maddeningly catchy (emphasis on "maddeningly") BGM themes ever. The dissonance of the tune creates a feeling of insanity, it's almost as if the music is laughing at you.
And finally, one that's from another game:
Snake Man's Theme
Where/when it would play: When being chased by a naga. Seems appropriate, huh?
Anyway, those are my picks. What would you choose, and why?