What I would enjoy:
1.) more engine choices and more engine sounds.
2.) inport field images (lots of work for the programmer)
3.) more images for creating and/or mofifying a flying site
4.)realistic weather ( a 5 mph wind seems like 50, it pushes the model off the runway when the engine is killed)
5.) fix or make possible some of the current flying site graphic options (clouds and color options)

All in all I enjoy RF