After many visits, I've gotten down to maybe three things I ever would go to the Studios for.

Rock 'n Roll Coaster

Tower of Terror

One Man's Dream - just to see the wonderful theme park artwork by the Imagineers, especially the original maquette for the Tree of Life at the Animal Kingdom!
Maybe the new auto show will be fun once or twice.
My six year old would add:

Honey I Shrunk the Kids Playground

Chicken nuggets at the Sci Fi Diner (actually, I could go for a burger and a chocolate milkshake from there right now!)