Have to agree with the others...
First shot is soft as is the third, but not as badly. First is a good idea and worth a reshoot, but you have to correct the white balance issues and maybe go to a faster lens to diffuse the background a bit more (especailly imortant if shooting only using available light).
Second works the best out of the three, but has all the elements and imperfections of a casual snapshot on the back porch some saturday afternoon. (the pose is great, the composition and lighting...not so much.
From a technical perspective #3 has more wrong with it than right...sometimes one can pull that off, but not this time. Again, pay attention to composition, background elements, shadow/light, framing.
By all means keep shooting, and keep asking questions, and you'll see yourself improving by leaps and bounds if you focus and pay attention. I'm not trying to *bust balls* really, but I was kinda shocked at the comments left on Mayhem, they were either being extremely polite and gracious, or they just don't know any better. Sorry if I've offended you with this post, but it is meant to be constructive and give you positive steps you can take to improve your photos going forward.