Each dwelling unit and combined complex of dwelling units shall have a compatible architectural theme with variations in design to provide attractiveness to the development, and which shall include consideration of landscaping techniques; building orientation to the site and to other structures; topography; natural features and individual dwelling unit design such as varying unit width, staggering unit setbacks, providing different exterior materials, changing roof lines and roof designs, altering building heights and changing types of windows, shutters, doors, porches, colors and vertical or horizontal orientation of the facades, singularly or in combination for each dwelling unit.