I've been thinking about this thread and how, ultimately, a Ni-dom's personal preferences cultivate Ni. My choices would be different than another person's playlist. My playlist would be Neurosis heavy, for example, and I gravitate toward atmospheric music when I am focusing on Ni/Ti or Ni/Se centric tasks, as well as just letting my Ni dominate and "be".
There is no reason be-bop wouldn't stimulate Ni, either. The complex chord progressions and spontaneity – notes and changes referencing what was previously played, for example, could be very Ni.
But what about Classical music? I am not well-versed in music theory but live with a fellow Ni-dom (Ni/Te, which makes sense) who has a degree in Classical Composition. Via my experiences with him, I have some knowledge about this. Classical seems like Te/Ti music, but I think, for example, the musical perfection of Bach and the use of Fibonacci by Bartok appeal to Ni due to how the notes reference each other, connect, and how the composition spiderwebs across itself to create complex patterns. The music is resolved, whole, complete. Ni takes from here and there, notices nuance, symbols, patterns, relationships, and resolves those pieces with final ideas that seem to come out of nowhere, but truly do not.