Something that would be really cool would be Airlines that you can fly with people. There would be a schedule of flight that are leaving at certain times and at certain airports. You would fly people around and there would be other aircraft from this airline in the same location at the airport. Another option would be to fly cargo for the us army or major companies such as Verizon or something when you do these missions you can get money for each of these missions and buy more and better aircraft. this probably wont be able to happen with simviation it is just a suggestion some computer genoius might be able to find a way how to make this an addon. It may be too big of an addon and i may just have to e mail microsft and suggest it for the next flight simulator.

Also check the payware add-on "FSPassengers" if you want a real challenge.

best,

.................john