Magic Kingdom
Main Street USA - Plaza Restaurant. It's a nice place to have a nice meal.
Adventureland - Pirates of the Caribbean. My favorite Disney attraction ever.
Frontierland - Big Thunder Mountain Railroad. My favorite Disney coaster.
Liberty Square - The Haunted Mansion. Tied with PotC as my favorite Disney attraction ever.
Fantasyland - It's A Small World. Probably not most people's first choice, but compared to all of the other minor league attractions in Fantasyland I'd rather see this than any of the others.
Tomorrowland - Space Mountain. I dearly love the Peoplemover but Space Mountain was an easy choice for me.
Only having two theme areas makes picking things to do in
EPCOT a major drag (and really tough) but I'd probably have to go with:
Future World - Spaceship Earth. My favorite EPCOT attraction.
World Showcase - Hmmm, this is tough. Can San Angel Inn/Gran Fiesta Tour count as a single choice since they're both in the same building?
Animal Kingdom
Discovery Island - Flame Tree BBQ. I'd rather eat than see It's Tough To Be A Bug again...
Africa - Kilimanjaro Safari. Kinda the backbone of a visit to the Animal Kingdom I think...
Asia - Expedition: Everest. One of my favorites, working Yeti be damned.
Dinoland USA - Dinosaur. Another great attraction.
Camp Minnie Mickey - Legend of the Lion King. 'Cause what else am I going to pick, a meet and greet?!?
Rafiki's Planet Watch - I guess this is the one place in WDW where the whole land is the one attraction.
Hollywood Studios
Hollywood Boulevard
- The Great Movie Ride.
Echo Lake - Star Tours. A great attraction significantly improved by the most recent update.
Streets of America - Muppetvision 3D. How could I NOT go see the muppets?!?
Animation Courtyard - One Man's Dream. Even if any of the other choices in this area were any good I'd still choose One Man's Dream.
Pixar Place - Toy Story Midway Mania. Maybe someday there will be more than one choice here too...
Sunset Boulevard - Tower of Terror
. While it wasn't really even close for me (since Tower of Terror is a modern classic) it is sad that Hollywood Studios only has one area in the entire park where there are even two attractions that could compete head to head for possible choices. Every other area was easy for me to choose a winner since of the areas that actually have more than one thing to see or do one attraction clearly outclasses all of its neighbors.