More depth of field! All of these shots could benefit from a larger depth of field. Switch to aperture priorty mode with your largest aperture (I think it's 5.6) , zoom all the way in, set the AF point to the center dot target her eye and then shoot.
The second two images benefit by where you've placed yourself compared to the model, for some reason (to me that is) the downward looking shot doesn't work well and she doesn't seem to respond as well to it.
The third image is nice but I think the focal point is distant, as she appears a little soft however the background is a little more in focus.
The color in these shots looks spot on, nice job there. Also your model is doing a great job of being herself, sometimes that can be the hardest part.
Hope some of this helps, overall nice work, don't stop.