For the whole family - we enjoyed It's a Small World and Storybook Land as well as traipsing around Adventure Isle and the Pirate Ship. We liked the castle, but the dragon was scaring little kids - all the under 5's in there were crying.
Adult stuff - We thought DLP's Big Thunder was the best one we'd been on (compared to WDW and DL). We haven't yet been to Tokyo (5 months and counting!), though. Of course, Phantom Manor because it's different, and POTC is always a must-do. We did not like Space Mountain 2. We both kept banging our heads on the padded restraints and it hurt so bad! I was practically crying because my ears hurt so much. Maybe others enjoyed it more, but not us.
Have fun! DLP is great! We want to go back, but Tokyo is first for us.