Not such a big fan of Vocaloid, but some of the songs are actually pretty good.
Top 3 Vocaloids would probably be perhaps Kagamine Len, Kagamine Rin and Gumi in terms of sound. But if you add in other variables, perhaps I would have to stuff Gakupo in somewhere. [orz]
As for Top 3 producers, definitely Wowaka, Ryo and the last one I can't really decide, perhaps Iroha-P?
Top 3 Vocaloids would probably be perhaps Kagamine Len, Kagamine Rin and Gumi in terms of sound. But if you add in other variables, perhaps I would have to stuff Gakupo in somewhere. [orz]
As for Top 3 producers, definitely Wowaka, Ryo and the last one I can't really decide, perhaps Iroha-P?