People do not put much effort into critiquing each others work any more.
If it is a good design, then the "attaboy" would be fine. But if you do not follow the rules, then someone should say something. Not to make you feel bad but to help you get better... If you really do want to get better!?
Do not use textures snagged from the web and photoshopped into the drawing.
The rules are still 6 color and your own work, unless otherwise noted.
If I am incorrect on this, please feel free to chime in; oh woot gods!
People once spent much time debating the validity of every design, even if it only had one vote. It wasn't the position of the shirt in the contest that made it a target, but the attitude of the designer. If the designer appreciated the feed back and listened to the criticism, then they would excel. If they made excuses for their mistake and tried to justify it, then they would often become marginalized. This did not always negatively affect the votes for that artist, but it did shine a light on the anomaly.