For me it was really an accident.
For years I've wanted to play with autoCAD or some sort of 3d software to create some scene studies for the fiction I've been writing. My dilemma has been the tech at my disposal - school, employment, student loans, etc., has meant that if I didn't build a computer myself, I've had to pick up a cheap obsolete one.
I discovered Anim8or about 3 weeks before I discovered Orbiter.
It was an opportunity I hadn't dared dream of! It's the sim I've waited for since the Gemini program. Now I can make these sets, and then play with them in a real-time simulator environment.
And I can potlatch them to anyone interested when I'm done!