You just made my day.... my DS4 LOVES Cinderella too!
OK, I've been taking him since he was 6 months old, so I'll try to list the best and worst from his perspective.
Magic Kingdom
Favorites: WDW Railroad, Peter Pan, Small World, Cinderella's Carousel, Winnie the Pooh, Dumbo (forget it - there's no getting past this one with a toddler, get on it first thing when the park opens!), Buzz Lightyear, Tomorrowland Transit Authority
Enjoyed but wasn't thrilled: Jungle Cruise, Pirates of the Caribbean, Tom Sawyer Island, Riverboat, Haunted Mansion, Toontown
Epcot
Favorites: Living Seas, Living with the Land, El Rio del Tiempo (MX ride), toy shop in Germany, gardens and koi pond in Japan, Canada pavilian, huge shop in China
Enjoyed but wasn't thrilled: Spaceship Earth, Journey into Imagination, Universe of Energy, Maelstrom, movie in France
MGM
Favorites:Playhouse Disney, Muppet Vision 3D, Streets of America
Animal Kingdom
Favorites: Kilimanjaro Safari, Pangani Exploration Trail, Rafiki's Plant Watch (petting the goats was a major highlight!), Maharaja Jungle Trek
Enjoyed but wasn't thrilled: It's Tough to be a Bug, Flights of Wonder, Dinoland (didn't ride anything)
Any attractions I didn't list he hasn't tried yet, either because I know it's too much for him or he doesn't meet the height requirements. Hope this helps!