Which disney theme park in florida is the best (roller coaster wise)?

Probably Magic Kingdom with its three "mountains": Space Mountain, Splash Mountain and Big Thunder Mountain. Of course, Hollywood Studios has the ever-popular Rockin' Roller Coaster, Animal Kingdom has Expedition Everest and Epcot has...well, Epcot doesn't reallly have a roller coaster, per se, but it does have Test Track, Soarin and Mission Space. But in the purely roller coaster sense, Magic Kingdom.