Fodors did a survey:
According to our poll, these are the most overrated attractions in the world:
1. Disney Theme Parks
2. The Leaning Tower of Pisa
3. The Eiffel Tower
4. Times Square
5. The Louvre
Actually, I like Times Square and the Louvre. Other overrated attractions, at least in my experience: Venice, Machu Picchu, Victoria Falls, Seattle Space Needle, Cape Cod, Miami Beach, The Alamo, Hollywood Walk of Fame, Lanai, Fisherman’s Wharf (San Francisco), Singapore, Graceland, Corcovado, St. Taffy’s, Lake Lucerne, Costa Rica Cloudforest, Florida Everglades, Boston Pops 4th of July, Mob Museum (Las Vegas), Bourbon Street, Spy Museum (Washington, DC), Montenegro, and ??
My favorite tourist attractions: Amazon Rainforest, Angkor Wat in Cambodia, Great Barrier Reef, Checkpoint Charlie at the Berlin Wall (when it was standing), Musee d’Orsay, Smithsonian Air and Space Museum, Antelope Canyon (Page, AZ), Grand Bazaar (Istanbul), Hotel Moskva (Belgrade, Serbia), Wimbledon, Pebble Beach, Kauai, Indy 500, Kentucky Derby, Roland Garros (French Open), Ebenezer Baptist Church, Copacabana Beach, Lake Baikal, the Winter Palace, Champagne region, and ??
I think they key to your travels would be to follow and visit what you enjoy. For me, it is sporting events, food and wine, historic sites, and people.