We did a 3 park day trip in May. Arrived Thursday late, left Monday early, 3 full days in the park. We hit MK at rope drop on Friday, hit BTMR, SplM, POTC, Jungle Cruise. Hopped to Epcot, had FP for Soarin, and enjoyed the F/G show. Stayed in Epcot till after dinner at Coral Reef. Then hopped back to MK and stayed until after midnight. Day 2, DHS in the morning, a nap, and then back to DHS for fantasmic, then back to MK. Stayed until 2am. Rode everything, including 7dmt with only 20 minute wait. Day 3 all day at MK, FP for 7dmt and rode everything we wanted to, stayed until after wishes, and then went to the hotel to crash. It was a whirlwind trip. Came back exhausted, but had a great time. Rode everything we wanted to ride, didn't see a lot of shows, but thats ok.
If the kids had been with us, it would have been completely different. DH and I just go, go, GO!