A few tips regarding the artistic side of screenshots:
Use diagonals. They draw the person in towards the photo, or in this case, screen.
Experiment with different weather. Flying is not all light fluffy clouds and blue skies.
Also, try some enviornment addons, like water textures or sunset textures
Zoom is a good effect. To get different types of zoom without the standard Microsoft settings, press and keep pressing shift, along with the + and - keys.
Keep those in mind along with the graphics portion, and you'll be churning out great shots in no time!
That's very nice for the first time, though.

James