T-Shirt Designs

I'm starting to get into T-Shirt Designs, and I joined Treadless. It's a site were you post Designs and if your design gets choosen then the site pays you and your T-Shirts go on sale.

Here's a few of my shirts that I'm waiting on to be ranked, so I can decide if I should sumbit them to the site;

http://www.threadless.com/critique/40992/Guinea_Pig
http://www.threadless.com/critique/40988/Red_Headed_Girl
http://www.threadless.com/critique/40986/Bird_Deign