For a sixteen year old daughter, I would have her go out and check the attractios and give you her ideas. For my husband and myself (in our early 50s), we like everything in Future World. But note that Epcot has a tiering structure for FastPasses so check that out if you are only doing one day. I would say Ellen's Energy Adventure, The Living Seas, The Imagination Pavilion, and Spaceship Earth (at the end of your day) can all be done standby. Soarin', Mission:Space and Test Track should be FastPassed with Soarin' being the first choice due to popularity.