Wow, that's tough....
We've been so many places, 49 of 50 states (Alaska yet to see), and 10 other countries, plus the Caribbean and Virgin Islands. Every place has something going for it.
We enjoy Florida the most, Sanibel Island on the West, St. Augustine area on the East, Disney in the middle.
We do some RV'ing and love the State and National Parks. We go to Smoky Mtn NP a lot, but love Yellowstone, Bryce Canyon, Grand Canyon, and Arches NP. Haven't really done the California parks up right yet though.
The top of the list probably includes Hawaii, the Northeast areas, and the South from Texas to California. Las Vegas is also one of our favorites. Next come all the mountain areas including the Rockies, the Smokies, and the Applacians.
Besides Disney several times a year, places yet to see include Alaska, China, Russia, Australia, and Africa.....
So much to do, so little time.......