American food culture is far more sophisticated than its fast-food stereotype. Each region has distinctive cuisine: New England clam chowder and lobster rolls, New York pizza and bagels, Southern BBQ (Texas brisket, Memphis ribs, Carolina pulled pork), New Orleans gumbo and po'boys, California farm-to-table, and Chicago deep-dish pizza.
The US diner experience — all-day breakfast, enormous portions, bottomless coffee — is a cultural institution. Food trucks in cities like Portland, Austin, and LA push culinary boundaries. Brunch culture is enormous on weekends. Portions are massive — sharing dishes is normal and accepted.