A dedicated airport map seems like a nice, unique idea. Now we just need some planes and helicopters to fly...
I would make more aircraft if I knew how to. (In fact it would be the first thing I want to do) I have never done vehicle modding (successfully) so I cannot do it yet... but maybe later? Also, I wish there was more thorough documentation for modding and map making in the game. I have gotten the hang of it now with map making, but it took a whole lot of testing, asking in the forums, and reading old guides to get there.