My itinerary is always driven by the first day at MK and then the second day at MGM and then we go from there.... you should see which parks are open late at night - if you are close enough to go back to the hotel mid-day and nap/swim/refresh and then go back to the parks, choose those parks that are open late at night.
We often do this - especially with Epcot which my DH loves but DD's hate - we do that in the morning until right after lunch - go back to the hotel and then go to MK or MGM for the evening hours.... that way everyone is happy!