Hey maybe blur out the background to really focus more on the girls face.. Also
in the picture a lot of her features (lips, eyes, nose) seem to be meshing together so I would try to separate them more.
I hope this helps

The only thing I really notice would be that her eyes are fairly large and don't look wet. Yea, you have some highlights on the iris and pupil area; but the white of the eye looks very matte. You could also probably get away with flatting her left cheek inwards a bit as well.

Overall though, this is pretty good. The skin tone and the rest of the coloring (like the hair) is pretty spot on. The shadows are well present adding a nice sense of depth. You could probably add a bit of highlights to the gold border of her shirt's collar though.

They is some proportion and position problems. The head is way to big and the ear are to high for examble.
Also the background is on a closeup/portrait irrelevant. If you want to show the viewer where she is you should go for a mid-shot for examble, because than you have way more space to fill and you avoid that the picture get too noisy.

The colors also a bit tend to go blackish which i would mostly try to avoid.
Here a Overpaint:

Cheers!

Would suggest simplifying things. Try grouping things like eyelashes and strands of hair together. It will make it easier to see the forms and make it feel more three-dimensional even with less detail. To avoid getting to caught up in details and instead focus on the broader things I would suggest zooming out a lot, also squinting at the image is nice. Try having some hard edges in the image. The ones I'm seeing are in the background and around the silhouette which draws a lot of attention from the focal point.

Here is an overpaint as well

@shiv0r I feel that you lost a lot of what made the original picture special and just created a similar-ish character in a similar pose. While I do like your overpaint for its own reasons, you changed way too much from what the original was. The tone is different, the color is different, the environment is different, the focal point is different, the character looks nothing like she did before, none of the features are even similiar :confused:

@chassler11 These changes are spot-on, especially around the eye!

@fprbros Nice work with the original! My first though for critique though was at the focal point, the eye: her eyelashes were too light and didn't cast a sharp enough shadow on the eye, making it a bit flat. I also suggest checking out some online hair tutorials. It looks like your just taking a streaky brush and running it down where the hair would be. You should try inside blocking out sections of hair with a thicker brush and adding detail in from there. Maybe this or this could be helpful.

@unilluminated Of course i changed the colors because they are not working quite well in the original. Even if he want more local colors, i would shift them subtle or use a limited colorpalette to make the shadows colder and the light warmer. Changing the blackish hair to more brownish hair and the black iris to green is not a big deal. Also give some more childish characteristics because as long the base is right you can adjust it pretty easy in digital and the base is in his picture not right.
The same with the environment why i should keep the trees if it makes the picture busy and i suggest anyway if he want to show where she is to expand the view to a mid shot. If he want to go close up/portrait remove it, because it makes the picture busy and noisy from the distance.

He dosen't need to copy my image one by one, because it is one direction from countless direction that he can go. The direction should just make sense that's important.

Cheers!

Thank you guys, you are great. Your advices are really helpful.

With the colors the only thing I noticed are the shadows are a little too black and muddy. Adding a different hue to them should fix it, like with @chassler11 did. Its subtle but its there.