Hi,
I'd love to submit something to your contest, it sounds like fun.
The examples you included were of characters on a background/in a setting. Would like like to see that specifically, or just the character him/herself?

Like the challenge!
I also agree with Tova´s comment on the background.
I see the 2 samples you provided wear glasses... just coincidence?

luis

you need full body or half body

Without background is better.

without background. glasses are just coincidence.

half body is fine. but I prefer full body.