I hope you don't think my critique is mean. I can see why you're not proud of it, but I wanted to give you an official Critique since you were kind enough to give me a Watch.

Vision: Clearly you were going somewhere with this. You definitely had the vision to make something good, and you went on your way!

Originality: I gave you 3 stars instead of two and a half because you used the alternate Miku! I couldn't really give you more, even though I wanted to, because a drawing of Hatsune Miku, the most popular anime character in the world (Who isn't even in an anime! ) can only get but so original.

Technique: I'm sorry, but I kind of have to kill you here... Please forgive me! Technique is supposed to show your degree of mastery over your artform, and this picture doesn't show you level of skill and mastery at all. I went looking at your other works and this is... actually probably the worst one you have. That means you are a better artist than this pic shows!
You may have chose to make her head the way it is on purpose, but to me it looks like her neck is too long and her nose is place WAY too low. Her arms and back are so straight, and her arms look like she was made in a machine, like they were just stuck on. And her back... Miku's back should have more arch than that. But achieving that would be a bit challenging from this perspective. It could have been improved just by drawing it straighter instead of curved the way it is. Maybe looking at some arms and legs would have helped you? I don't know, because the subtleties of their lines might have been hard, but you can at least do a little better. Her legs, her knees are in the wrong place, up too high, and her ankles are too big, so it looks like poor Miku has "cankles". I think her feet are too small too.
The thing you made best use of was color. The transparency of her skirt is nice, and I like the gradients, and how her bright color contrasts with the black, dark background. I bet the whole reason you started this pic was because you had a beautiful idea for a great picture with pretty color gradation on a very black background, and how Miku would light up the picture! Even here, though, you could have shown more mastery. The way you made her hair shiny, the picture would be much better if her pigtails shone like that too! And I bet there were other things you could have done with the color.

Those things about color are what created the Impact for me. That's why I rated Impact highest. I think that was the whole thing of this piece. I was looking at the she sings picture of a mermaid you have, and you got a Critique on that too, and it got similar scores, with Impact being the highest, so I think you really know how to make impact-ful work.

The problem with this work looks like it combines all the flaws of other things you made into one package.
Here are the easy things that could have made this better without years of practice:
Put more of the shine on her head onto her pigtails.
Shorten her neck just a little.
Keep her nose like it is but move it up.
Change the angle of her back so she's not slouched. You might need to move her head and shoulders back to achieve this.
Usually you need to give your characters smaller wrists so their hands are more prominent. This time you did okay with that, but now it's hard to tell what her hands are doing. What position are they in? I couldn't even tell when I downloaded.
Move her knees down
Make her ankle smaller, so her things get a little bigger at the foot.
Make her foot a little bigger, either by making it longer, or giver her "taller" toes. Or both.
Have more fun with the lighting!

I really hope you do not hate me after my Critique I gave you. I wanted to tell you things that could make you better. You are a better artist than me, but I have a better understanding of anatomy, pose and perspective, I think.
Keep working on your Technique, and study anatomy more! It worked for me, and it will work for you too!
Go you!!! Good luck!