>>468Feel free to correct me but I think what the anon you replied to was referring to is which songs the Japanese side of the fandom considers to be good for introducing someone to Vocaloid.
Over here it's common for people to recommend the classics (Rolling Girl, Meltdown, etc). You can get a general idea of what people recommend in this thread:
>>>/leek/21305But since Vocaloid is arguably more popular now than it was years ago, people also recommend new, popular songs like Mesmerizer.
I'll give my 2 cents and say that there's no definitive song to introduce someone to Vocaloid because at the end of the day everybody has different genres they like, but I do think that the classics are a good starting point.