The beauty of cities is that they are different from each other, that is, that each place has its differences in buildings, in the streets, in squares, etc. Because in the difference is beauty.
Scale
That the buildings were neither too high nor too low, that is to say, the ideal would be a maximum of 5 stories high.
Orientation and mystery
A city should have more contact with your neighbors, that is to say that the houses are close together and that the city has small and narrow streets where you can get lost.
Visible live
It is important that a city or is dead, that is to say that there are people walking and working on the street.
Compact
that is neither too big nor too small
Not too chaotic, not too ordered
An important thing of a city is the order
It is also important that there be varity, that is, that not everything is ordered.