Festival of the Lion King is incredible. It's Tough to be a Bug is always a good time, plus getting to wind down there at the base of the tree and see all the cool details. I loved Na'vi River Journey. All of the animal experiences are great, including the Up! bird show. If there at night, definitely the Tree Awakening is worth hanging out and waiting for. And I haven't seen it mentioned, but we really loved Rivers of Light when we saw it this past summer for the first time.
If you're going to grab a bite to eat at AK, I like Flame Tree BBQ and sitting out there under the pavilion on the water. Only if you're not bothered by birds...sometimes LARGE birds, hanging out with you while you eat.
Speaking of birds...Kevin! Must always look for Kevin and get pictures of her.
Man. I do love Animal Kingdom. I'm pining for a visit now.