The shots #1, #2 and #4 are great.
On the first, you managed to capture some very good looking clouds, and you used the virtual cockpit, producing a very nce 'I don't want to be there' feeling

On the second, you used a good view angle to show the nice colors of the plane, and you were close enough to show the details. The zoom and the background trees add a lot to the overall quality. Perhaps you should just try not to cut the nose of the plane, other than that, it's great !
On the fourth, you just show perfectly the beauty of the model and the repaint. Nothing to add.
Some more advises:
- zoom is dangerous. Too much zoom will limit the amount of details offered by the background scenery (if there is any. If the background is the sky, you don't care), and it might also emphasize the ground blurries, so choose your angle of view very carefully when you use a high zoom.
- zoom is dangerous (2): sometimes, instead of using the zoom to make the plane look bigger in the picture, you can simply get closer to it. Use CTRL+ "+" and CTRL + "-" to slowly (veeeeerrrry slowly

) move the camera toward or away from the plane. When getting very close to it, you might want to decrease the zoom to something like 0.70 or 0.60. Be carefull with the lower values, you must avoid the "fish-eye" effect.
The other shots that I have not mentionned above are too classic, with few interesting details in them. You'll have to work on the view angles to make them a little bit more interesting and originals
