Depends on who is in your group. My 12 yr old DS's favorite park (after MK) is now AK. He loves Dinosaur, KS, TTBAB, Primeval Whirl, the animal trails, Kali River Rapids. So if it was just my son and myself, we'd do AK (I also now LOVE this park). But if you asked my DH and DD (15) they'd say MGM, as they love TOT, RRNC, Star Tours, Muppets, the stunt shows, Millionnaire. It's a really hard choice. If you can, park hop, doing AK attractions early and then hitting what you really like at MGM. and end the day with Fantasmic.