I just got back last night from Disney. It was a workelated trip so we were only able to visit Animal Kingdom and Universal Studios: Islands of Adventure. Both are FAB!!
Animal Kingdom is an AMAZING place for photos. Seriously amazing. The Tree of Life (or whatever its called) is just gorgeous and I could photograph it all day and never get the same photo twice.
The safari is also an amazing photo op, but it moves pretty fast, so be sure to be quick with your trigger finger.
As for rides, we LOVED Expedition: Everest. I think we rode it four times that day and only wait in line for no more than 10 minutes (mostly we were able to walk right on).
The Dinosaur ride was really cool too. And I've heard great things about the Finding Nemo stage show. We didn't get to see it (DH hate theater... boo) but everyone that saw it loved it. Young and Old.
The Bugs Life 3D show was good, but better for young kids. It was a nice place to cool off.
Oh, and another fun thing about the parks right now is that they have just put up all of their Christmas decorations! Its so pretty! I loved the tree right outside Animal Kingdom. :0
Have fun! Its a perfect time of year to go!