Every person in the US has a different taste to what they like or dislike and the same goes for every person in the world. They say that the United Sates of America is a Melting pot and it is. Southern creole, or cajun cuisine have major French influence, add to that also Jamaican, Spanish, and African. Northern cooking styles are Italian, Polish, German, and Oriental influenced. East Coast is different from West Coast. Pizza is a perfect example, in New York its cracker thin crust, Chicago id deep dish layered, and the West coast is a "medium" thickness crust. California style of pizza in particular goes any way you can imagine from salmon and cream cheese to bbq chicken, pesto sauced with spinach and bacon to 100's of other variations.
Myself, being a retired professional chef got the opportunity to cook all over the States and in Japan by my choice. I worked my first job in a Italian restaurant over 150 years old today run by the same Italian family that started it. There are "American" foods but no American Cuisine because there are so many regions and people from so many nations in our great country. Although Sweet and Sour Pork in America is "American and not Chinese. The fortune cookie is also an American food invention.
Next time you go on a trip away from home find the little hole in the wall or local favorite away from the mainstream restaurants like Hardees, Mc Donald's, or Denny's. Eat something different and learn more about the foods from each place you travel to. Go out and try Scrapple sometime. Sushi from different regions, pizza or strange local favorites like buffalo burgers or Rocky Mountain Oysters. You'll learn a lot and appreciate "American Cuisine" much more.
As for my favorite region? The south and I mean deep South good ole southern bbq true cajun and creole food with critters thrown in. suckin crawfish heads over a beer or trying alligator or nutria. and a beignet for dessert