I've cycled in 33 US States ...
Alabama, Arizona, California, Colorado, Connecticut, Florida, Idaho, Illinois, Iowa, Kansas, Louisiana, Maine, Massachusetts, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Hamshire, New Mexico, New York, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, Texas, Utah, Vermont, Washington, West Virginia, and Wyoming
and they all had nice parts to them.
But my top 3 favourite places to cycle are not in the US.