On a visit to Japan, I had a huge revelation regarding roof lines. Their ease with combining complicated roofs for different structures was awe-inspiring. They made it so easy!
We often design shade structures for outdoor living. Preferably, the team architect designs these, but when they are straight-forward structures, we will design them ourselves. Roof lines are the most difficult piece of the structure to get right and I have often heard from architect colleagues that a good roof line is one of the main litmus tests for a well-designed building.
While Japanese-style architecture is usually not the right style for our clients, understanding how the Japanese have worked with roof lines has been a great inspiration.