You have nothing to worry about. You have the body, a really good look. The only thing letting your portfolio down is the standard of photography which is not your fault. Get some more decent images and the rest will come with practice and experience.
1) the site down fall that your in america and this is a uk website (maybe modelmayhem could help you more)
2) you facial expressions, in nearly every image you look like a terrified rabbit in the head lights, maybe see if you can find a photographer and just play around with pulling some faces and finding out what works