This one looks like she's catching flies.
She could be good if you can get some real contact out of her.
Second one looks bit "street hooker" like. It's the eye brows and I would only expect she will sell with a fetish market, try leg sex type scenes.
This one is the one with promise and needs a bit of coaching and confidence I think.
She just looks like she could blossom into something worth while. Sit her down and explain what she needs to do to project herself properly.