As a person who knows little about Zatsune Miku...or about Hatsune for that matter, I can say that I appreciate this picture not for the character but for how you designed her. It's dark, but not in a creepy sense...it's got a tone that is very opposing to the usual images I see of Hatsune Miku. She doesn't look angry or happy...but somewhere in between. She looks challenging...as if daring you to stand opposed to her ideals.
I also like the appearance you have her...the background is edgy too. Particularly that shadow...now that's just eerie. Hahaha!
Overall, a good pic. I'm sure it means a lot more to fans of Zatsune Miku, but to me, I appreciate the pure artistic effort put into it.
Wow! You're spot on with what I was going for!! Thank you so much for all the critique, always put so much time into it and I appreciate it >.< And the background just kinda..happened lol it was like an accident!