FS2 so much needs to ability to create or generate missions to assist and motivate flights of fantasy.
Imagine a configuration file (not even interpreted script or visual editor) that generates missions from a template like:
1) Spawn chopper at compatible airport.
2) Spawn rescue victim at river or mountain peak within X kilometers of airport.
3) Display to player land mark with range of mission objective
4) Set win / lose conditions for completion ie. hover within X meters of target for Y seconds.
Later the software could become more complex than this, but Version 1.0 could be super simple, not add CPU burden or require more than minimal UI work.
For example, Version 2.0 might add triggers and media. Eg. Trigger to launch rescue flares within 5 miles of victim. Trigger to play audio file for voice overs at certain events. Mission briefing and end of mission result plus score dialog.