I'm so bad at this. But I'll give it a shot.
Changes made:
- Changed her hair back to how I imagine you had it in the first place
- Changed the shadows on her pants
- Lowered the boobs, tried to make them a bit round. Square boobs just look like muscles.
- Changed the light direction on the ear
- Added some shade around her eyes and under her hair
- One change that someone with more wisdomz should probably comment on, is what I've done to the color ramp used on her top. I don't like grey as a shade to blue, because it kind of looks warmer to me (having less blue and more of every other colour in it). Maybe I've got that wrong.
- Changed her shoe colour because I just wanted to add a bit of character and I got bored