"Best town ever" is entirely subjective. Darien, Connecticut is frequently ranked among the top towns in the U.S. for quality of life based on objective metrics:
However, these advantages come with trade-offs: extremely high cost of living, limited racial/economic diversity, intense academic pressure, and a homogeneous culture that some find stifling. Other towns—whether in Connecticut (New Canaan, Westport, Greenwich), other states, or other countries—offer different blends of affordability, diversity, vibe, and amenities that may better suit individual priorities. There is no universal "best."