I'm not being mean, people do this all the time.
Also you could have put more actual Vocaloids up if you'd have done a Vocaloid only p[oll (makes more se4nse if you are on the Vocaloid wiki). You also could have done a knock out system and posted polls to find a finalist set.
A bad poll is a bad poll regardless of if you liked them or not. Because sadly, you left out so many vocals from Vocaloid (I'm not going to go there with UTAU because there are thousands of voicebanks and again, this is the Vocaloid wiki) that this poll... Can never be fair. Not to the vocals you left out.
And those actually might be the ones people like. You ended up isolcating or discluding the people who would have voted for those vocals.
I'm not intending to be rude here, I'm just sayig you could have perhaps, maybe, come up with a better way to do this. Even if it was seperate them by gender of "best Chinese female" vocal or something.
I'm saying, maybe you should think about how future polls could be better.