In 4 rides, I have only had the Darth Vader opening and the Ackbar middle but I have had all the destinations except Tatooine. Got to say Naboo is the best. I think the Death Star/Fett encounter and Hoth/ATT attack are cooler destinations but Naboo just kicks butt and is pure fun. It is the most gimmicky but it also shows off the upgrades to the ride the best.
So far I have gone through all scenes but I have not encounter Coruscant. However I like the Naboo scene but the Darth Vader and the Stormtroopers is my favorite, especially when he demands the Rebel Spy. I was lucky to be one of them, lol!