Thanks for all the commentary.
A few things in response:
I used Photoshop to edit the top two because the way they looked in the beginning was horrible.
I didn't use a ruler on the second one, I must have uploaded the wrong one because I was messing around in PS.
The shading looks bad because I have a bad scanner.
The third isn't finished because I don't know what to do with the sun's reflection.
Thanks for the cloud idea, I might try that.
Thanks again and this was pretty much the first time I really tried to draw.