Ok, after being a bit cinical and rude, I'll give my 2 positive cents here:
as for many others, I also had a long passion for hardcore combat flight-simming (from Falcon 3 days, DiD's EF-2000, Jane's series, to Falcon4 and its evolutions, then to IL-2 series, etc...). I even bought some expensive hardware like Thrustmaster Cougar and Simped rudders.
This passion came to a state of "saturation" around 2009/2010, where I took a break and I eventually found Orbiter.
That was what I just needed, and it gave me a fresh spark!
So to us now, do you have a joystick? Not terribly useful in space, but if you want to dedicate yourself to atmospheric flight, it's nearly a must-have.
Even if atmospheric flight isn't the best modelled aspect of Orbiter, you can have lots of fun and learn quite a few things.
At Orbit Hangar there are some "normal" airplanes, like this [ame="http://www.orbithangar.com/searchid.php?ID=7009"]Aero A-242[/ame], or you can use any other winged spaceship.
In this latter case you just have to take care of not going too fast or you'll rapidly burn your ship due to atmospheric friction.
The DGIV (maybe XR fleet too?) has some handy speed-limited autopilots that turn useful when flying around while studying navigation MFDs like the Horizontal Situation Indicator.
And what about trying some "hardcore" landings the way real F-16 pilots do, following the famous
Paul Wilson's landing tutorial? (<- download from Tuttovola).
Back in the Falcon days, this tutorial was (and still is) paramount.
It easily adapts to any other flight sim, given they have an FPM (Flight Path Marker - in our case, Orbiter's Prograde indicator).
You could start with the "DG-XR1 -> On Final Approach to KSC" scenario.