My nominee: Kansas City, Missouri and the surrounding metropolitan area. KC is truly the "most American" of American metros, IMHO. Why?
* Mid-sized metro with slow but steady growth. Not a boom town, not a Rust Belt basket case, but still healthy.
* Diverse mix of white and blue collar industries (auto manufacturing to many Fortune 500 companies),
* "Kinder gentler" sprawl (at least on the eyes; low density 'burbs with very strict architectural design, landscaping and signage standards) but with urban neighborhoods that, with some exceptions, remain fairly vibrant,
* Wide variety of architecture
* Gently rolling landscape; not too flat, not too hilly.
* Hot summers and cold winters; typical of North America's more extreme climate.
* Ethnically diverse, as still attracting immigrants from around the world.
* Home to many American food and music traditions.
* Native "newscaster accent".
* Politically moderate; somewhat more conservative on the Kansas side, somewhat more liberal on the Missouri side.
* Not a high-profile region, not much hipster cred, and not much planner cred.
* Bonus points for being in the Midwest, probably the most iconically "American" region of all parts of the country.