I'm a secretary, so I'm practically paid for my OCD-like ability to keep a schedule
When planning a trip, I always look at the opening hours for each park during our stay and plan our ADR's taking in consideration EMH, parades and fireworks. I put all of that in a spreadsheet, along with names of restaurants and events we want to go to. I make some "rough" ADR's at first when I can't exactly get the time/place I initially want and then I look them up each day to see if there are any openings for what we really wanted at first. So first, I've managed to "tweak" about 5 ADR's, changing their timeslot to better accomodate our plans.
I think it's part of the fun of planing a WDW vacation