Studios!!
We also love IOA, but we mainly just stick repetitively to Hulk, Spiderman, and Dueling Dragons while there. It's our "coaster" park. In the Studios, we rarely repeat rides because there is so much to do (with the exception of Mummy, which we always do multiple times). There is such a wide variety, too, from a coaster-type ride (Mummy) to a shoot-'em-up (MIB) to the ET dark ride to Terminator 3-D, which is my all-time favorite 3-D show, to Twister, which I'm not even sure how to describe...show, I guess, but not in the traditional sit-down-and-watch-it-for-20-mins. sense.
But for the kiddies, Suessland at IOA is absolutely adorable.