In my opinion, as of seven years ago, the Hulk at Islands of Adventure is the best roller coaster in Florida, but there were three or four rides at Busch that I'd rank right behind it. For sheer roller coasters, I'd pick Busch over any other Florida option.
They also had a terrific safari ride, very similar to the safari jeep ride at Animal Kingdom.
Maybe another allure to it was that we had spent the previous couple of days standing in endless lines at Disney and Universal. At Busch we never waited for more than 10 minutes for a ride. So we went hard, riding every ride three or four times. We ended that day completely exhausted... it was everything I could do to not fall asleep at the wheel while driving back to Orlando.