Splash Mountain
Big Thunder Mountain Railroad
Space Mountain
Pirates has a certain degree of thrill
Barnstormer (I think it is fun...)
Test Track
Maelstrom
Body Wars
Mission: SPACE
Tower of Terror
Rock 'n' Roller Coaster
Star Tours
Dinosaur
Kali River Rapids
Primeval Whirl!
I don't think there is any shortage of thrill rides, and unlike the amusement parks, where rides get boring after a couple years (therefore causing the parks to build something bigger and faster, like Cedar Point), just about all of these attractions have stayed extremely popular, even though many are not new. Far more people enjoy these types of attractions than 420 foot tall coasters that go 120 mph...it all comes down to where the money is, and I spend a helluva lot more at Disney World than I do at any amusement park, which should say something about how memorable experiences in both cases are.