Cities: Picture your idea of a city. Does it have a regular rectilinear grid of streets or irregular curving streets?
Curvy is always the answer. ;)
Square, straight lines, endless
My brain is doing a 50-50 split on this, visualizing alternately San Francisco and Cincinnati (probably the 2 larger cities with which I'm most familiar). Both are quite hilly, but they deal with it differently. (I voted squarish, though.)