Looking a lot better.
C&C is just my opinion and is as follows:
In #1 i think you did a good job with the pose and all but i have to bring up the background. Just take a minute or two in photoshop and remove the car and the person from the background just to clean it up a bit. Or use a larger f/ to throw the background further OOF
#2 - pose does not work for me at all. Also again, i think the DOF is too deep. Your eye is lead to the brightest spot on the photo, which is her shirt in this case because its blown out. From there i go straight to the gazebo and lose interest in the model. And again, the pose isnt all that flattering to begin with. When you hide people's legs, completely from the camera you can make them look like a paraplegic. You have givin the the look that your model has no legs at all because there is no trace of them in this photo at all.
#3 is a good pose, but once again id like to see a bit less DOF. My eye keeps traveling to all the the things the background beholds and away from your model. Since our eyes naturally follow lines, i go to your models face, and then down the path leading away from your model. Always look for lines to lead into the model, not away from her.
#4 Decent pose, you should have tweaked it a bit (have her sit up straight etc..) Again with the background though, i would have tried a bit less DOF...
I just looked at your equipment, the fact you lens is only a f/5.6 when zoomed out may be the cause of such large DOF... Look into the nikon 50mm 1.8... excellent lens for a great great price (100)