The guitar is a tricky instrument, but in my almost lifelong experience, it's absolutely worth every minute you spend with it.MM6-8 have all outstanding soundtracks. I have a faint plan to arrange these beautiful pieces for classical guitar and post them on YouTube. I'm really slow with making the arrangements and even slower with learning them (why do I make them so hard?), so it's still a thing for the future, but one day... perhaps I will make a channel.
Anyway, my most favorite piece of MM6 is the "Sunlit Snow Journey" (as shown by the fact that I arranged it and recorded the arrangement that Bones posted earlier). Flying over Frozen Highlands or Kriegspire with this delicate piece of music is a real treat. Suddenly I can forget about the blocky low-polygon graphics, low resolution textures, abysmal drawing distance etc., and only the calmness of flying over a quite snowscape remains... The music takes it onto a whole new level.