I live in Orlando so I guess I have to answer.
Animal Kingdom just opened up a new sweet roller coaster called Expedition Everest check it out.
There is Epcot which is cool, Sea World, Disney of course, Universal Studios and Universal Islands of Adventure (If you like coasters you must go here.)
In April it will be plenty warm so you have the beach and the numerous water parks like Wet n Wild, Blizzard Beach, etc. etc.
Universal has a whole complex there with tons of restaurants and themed places by the 2 parks. Downtown Disney has Pleasure Island for the clubs and such.
If you got any other questions just ask.