Why would I want my property included in a historic district?

From Portland Oregon http://www.portlandlandmarks.org/historic_district.shtml

Local historic districts are created to protect historic areas or groups of historic structures against loss of historic fabric and features and to prevent insensitive changes. The properties within a historic district are a source of community pride. The National Trust for Historic Preservation has found that local historic districts provide the following benefits to their communities:
-local districts protect the investment of owners and residents of historic properties;
-local districts encourage better quality design;
-local districts help the environment by contributing to the revitalization of neighborhoods and conserving the resources they contain;
-historic districts provide a tangible link to the past, a way to bring meaning to history and people's lives;
-a local district can result in a positive economic impact;
-local districts enhance business recruitment potential;
-local districts provide social and psychological benefits.