Second Tampa too! The suburbs and vicinity (I happen to live between Brandon and Plant City) are also great! (On a side note, you can easily reach Port Canaveral from there, especially if you are hankering a Disney cruise!)
And if you're rich enough (I'm soooo not exaggerating, folks), you can actually live in NJ! Great Adventure, a small park called Land of Make-Believe (my inner Mangione plays when I hear and read about it, I have to admit), its waterpark Pirate's Cove, and Mountain Creek, the successor to (Tr)action Park, are all there. Dorney Park is worth surviving Route 78 (We'd usually take Parkway south, then 78 west to there). Other places worth driving to include Coney Island, Rye Playland, and even Sesame Place.