The Girls

The left one would be my favorite

The left character of the three is best developed. The right character, her head looks like it may be out of proportion with her body. Its looks a bit small, but it could be the lighting, pose or hair that makes it look that way, but that's the impression I get in this image.

These are two great sources of information to boost your awareness of what it takes to be successful on Daz3D. You can buy these two tutorials on the Daz store.

How to Create Magnetic Promotional Art
Digital Art Live

Dream it, Plan it, Make it
Predatron

Daz3D has high standards for promo art artwork. That's where you will want to really ramp up your skills. Its easy to create a product, rig it and texture it, but it can be a challenge to make it look good for acceptance.

Keep up the work and you'll get there.

Oh thank you so much for the comment!! that's what I'm really looking for.. improving comments!!

You are absolutely right.. the right girl (Abigail) has a small head compared to her body.. what makes it worse is the hair that is covering the two sides of the head! it would give the impression that her head is too small..

the left girl Isabella has a larger head as an anime style and has a short hair. for the first look, it feels like a big head..

I'll look at them again with hairless heads (no hair attached) and fix the proportions.

Definitely I'll get the tutorial for creating magnetic promotional art.. at first when I saw the tutorial, I thought it is not worth.. but now since I'm in the hole, I should reconsider it!

Thanks once again.. this is really great feedback..