My DDs loved every single park, and they were both ride junkies from day one.
EP:
Journey into Imagination: younger DD loved it; older one hated it (too loud and dark)
Living with the Land: A favorite of both DDs
Spaceship Earth: Both loved it (especially where you take your picture and end up on the screen)
Nemo: Younger DD rode this at least 10 times on our last trip.
Turtle Talk: Huge hit with both girls
Seas pavilion in general was a highlight
Trains in Germany
Donald's boat ride in Mexico
Getting stamps at Kidcot stops
HS:
TSMM: Another big hit
Disney Junior Live: They both love this show, especially the interactive parts
Honey I Shrunk the Kids: Our favorite playground in WDW
Fantasmic: Younger DD loved it; older DD was a bit freaked out as a toddler
Muppets: They like it, but it isn't a favorite
AK:
Boneyard: Another awesome playground
KS: They both loved it
Triceratops Spin: Fun for toddlers
Dance
A highlight of our Sept trip
FOTLK: They like it, but it was a little long for them to keep still
MK:
Pretty much everything. We definitely spend a lot of time in MK each trip.
Both girls loved character greetings, but they were opposites on which characters they wanted to see. Older DD loved the cuddlier characters, but little DD wanted to see face characters (especially the princesses).
Meals:
Garden Grill, Ohana, Cinderella's Royal Table, and Crystal Palace are our favorite character meals.
For non-character meals, the restaurant inside of Mexico is fun because of the boat ride and atmosphere. Coral Reef also keeps their attention. Sanaa at Animal Kingdom Kidani is great because of the animal views.