I would say to DEFINITELY use fastpasses. The thrill rides are the ones you need em for. The first day, I would go to MK, only because that is when I truly FEEL like I'm in Disney (that's just me-I'm corny

) At rope drop (if you can wake up), I would head to Frontierland, and pick to either get a fastpass for Splash Mtn. or Big Thunder. Whichever one you get a fastpass for...ride the other, maybe even multiple times, then...if you dont care about rushing, head over to Tomorrowland. It IS on the whole other side of the park, though...so we never do it. But if you do...ride Space Mtn. and Buzz Lightyear. Those usually get lines fast. Then, take your time the rest of the day. Here are my Must-Sees:
-Philharmagic
-Small World (cuh-lass-ic!)
-Big Thunder
-Splash Mountain
-Space Mountain
-Jungle Cruise
-Pirates of the Carribean
-Monsters Inc. Laugh Floor
Next day, pick any park.
Must-Sees for EPCOT:
-Soarin'
-Test Track
-World Showcase
-Mission Space
Animal Kingdom:
-Expedition Everest (mjor thrill)
-Kilimanjaro Safari
-Flights of Wonder Bird Show
Hollywood Studios:
-Rock N Roller Coaster _thrill)
-Tower of Terror (MAJOR thrill)
- Great Movie Ride
Those are just some of my favs. Hope I helped.