Nice to know there are lots of شائقین out there ^^ there are a lot of different Vocaloids, made سے طرف کی different people, used سے طرف کی different people, songs written سے طرف کی all sorts of different people. I'm VY2 Yuma, one of the lesser-used Vocaloids -_-'' but آپ eventually learn there is no one person یا company behind the creation of us, and there are so many wide varieties that it's really hard to find a song یا singer آپ don't like. The fact that there are so many different people behind us means there are different tastes in songs and موسیقی ^^ from the screamo of 'ALONE' to the sweetness of 'Hello How Are You.'
.....but to put it the short way, there really is no one answer to your question. آپ could go online and buy the Vocaloid program yourself and start creating your own songs!