It really depends on people's preferences and transportation methods. And whether you have park hoppers or not. Without hoppers, you cannot enter 2 different parks that day.
Personally we like to have our ADRs near the park we will be at that day. Otherwise it gets too tiring to rush from resort to TS to park to TS, etc..
On the day that we go to AK, we like to eat a TS breakfast at Tusker's before the park opens. Then BOMA for dinner.
On MK, Crystal palace breakfast before the park opens, with dinner an easy monorail ride away at Kona Cafe, Ohana or 1900 Park Fare.
DHS is harder... just eating dinner at Sci-Fi that day, and breakfast at POP
ANd Epcot? Well, there's just so many restaurants in there it's hard to choose!!