Magic Kingdom - My sister and I get a picture of the two of us together in front of the Castle, I tear up looking at the Castle/hearing the music/watching the little children, then bolt right over to Pirates. Pirates is the first and last ride of every trip, no matter what. Then it's off to Frontierland for Splash Mountain. Pirates and Splash tie for my favorites.
Epcot - Hold my sister back from running to Mission: Space and drag her on Spaceship Earth. I love the smell of Rome, I'm sorry!
MGM - FP ToT and get in line for Rock N' Roller Coaster, then FP Rock N' Roller Coaster and get in line for ToT!
Animal Kingdom - I don't really care what I do first at this park, because there's only 2 things and they're Dinosaur and Kilimanjaro Safaris. When the new roller coaster opens I'm sure that that will be the first thing I'll do at AK.