This OT thread definitely delivers. Some of my favorites from various travels (that all rank on best meals ever):
NYC: Marea and Estela on my last trip (though the City has endless options so I rarely repeat, though Crispo is an all time favorite)
Paris: Epicure (my top meal ever)
London: The Ledbury
LA: Bestia
San Fran: Angler (more "casual" restaurant from the Saison folks)
Napa: French Laundry (hit Meadowood on last trip and while service and somm where 12 of 10, food was underwhelming)
Asheville: Curate
Florence: La Giostra
And if we are talking steakhouses, agree with
@Boarcane. One of my newer favorites was in Born and Raised in San Diego
Finally most disappointing experience ever: Eleven Madison Park