Hi Doug,
Just got your PM, just when I was about to leave the office

(I'll leave right after writting this post, my car is waiting for me in the garage with her new brakes).
Here are some remarks on these shots:
1- You have chosen a very nice-looking plane, with a nice repaint on it. This plane looks GOOD, definitely
2- You have not chosen a nice place though. A flat airport in the middle of an infinite flat space full of flatness

That's the kind of place I tend to avoid as much as I can, at least with the slow planes. It's very hard to get interesting screenshots in such conditions... however, there is a technique: this is one of the situations where you have to use extensively the zoom

Set your camera far away from the plane, get the ground out of the view, and use the various scenery elements (trees, buildings and other aircrafts) as background. There are quite a few aircrafts visible on your shots, I'm sure you can get some interesting view angle where they would all appear as if they were very close to each other (just like the zoom technique to get a giant moon in the background).
As an alternative, you can also put your camera very close to the plane, and make the kind of shots I made with the Beaver, see what I mean ? And with a little bit of experience, you should be able to make such shots and ALSO capture a piece or two of nearby planes.
3- Don't use only the normal external view (spot). Use also the special views, and if the DC-3 doesn't have enough of them, remember you can copy them from other planes

I have to escape now. I'll try to provide more details when I reach home.
Cheers,
Stephane.