I've been to France twice in the last decade. Paris, Normandy, Brittany (my fave!), Nice, Avignon, Ez, Tours, but not Chartres. Paris was at the top of my list of places I wanted to visit then, finally, I got to go. I'd go back, but it's no longer at the top of places I've never been. :)
Harder to pick the top of the list now. Ireland or Wales, I think, then Italy. Been to Austria but not Vienna.
A little easier to pick the places I want to revisit first: Scotland (particularly Inverness and Edinburgh), Iceland, Bath, Salzburg.