Autodesk provides many new AEC-focussed Generative Design samples for your to explore and learn more about the possibilities for applying these tools.
Open the Dynamo > Generative Design > Create Study tool, and you'll find them them in the Autodesk Samples folder.
You've already seen the Three Box Massing sample. But, be sure to check out the other examples to fuel your creativity in thinking about how you can apply Generative Design to other engineering problems.