Some possible arguments for the rectangle:
- The rectangle is good for stacking because no space is wasted between the elements?
- The rectangle is good for stacking because the circumference of the stacked elements is small, minimizing heat loss to the outside and building cost for outer walls?
- The rectangle is very cozy to live in?
- The rectangle is easy to furnish, because rectangular furniture is the best and fits in the corners?
- The rectangle is easy to build?
- Rectangular blocks is the only way to get usable streets between the blocks, and rectangular rooms fit well in rectangular buildings that fit in rectangular blocks?
- Rectangular pieces are the easiest to extend with more pieces?
- A, Circle: Space wasted between rooms.
- B, Square: No space wasted.
- C, Hexagon: No space wasted.
- D, Octagon: Multiple ways of stacking. Space wasted between rooms in every possible stacking.