I also enjoy the planning, so I don't think of it as a negative. But, I don't know what some of you are spending time on (80 hours?), and maybe some of it has to do with having more complicated travel plans and groups.
I estimate that I spent about 1-2 more hours than I would have otherwise. Almost all of this is because the FP+ system is tedious when it comes to selecting FP+ attractions and sliding reservations into preferred times.
Our upcoming trip is December 27 (arriving late afternoon) and leaving on January 1. I booked the
DVC reservation at the 11 month mark and made our flight reservations as soon as Southwest's schedule opened up to cover our travel days (I booked those with Rapid Rewards points). I also made a dinner reservation for BOG for Monday, December 30 when that became available. All of that obviously had nothing to do with FP+ or MBs.
Even before I had any idea that we would have FP+ available, I was looking at some of the planning websites (Touring Plans and easy WDW) to sketch out which days we would spend at which parks to maximize our chances of doing what we want to do, including taking advantage of AM EMH. That plan involved our usual approach of starting at one park, taking a break in the middle of the day, and hopping to a different park later. I did more of this than I usually would because of the Christmas season, which I expect to be even busier than Easter Week, with which I have more and more recent experience.
I also got a head start learning about FP+ because one of my daughters participated in a test when she took a trip in August to visit her CM sister.
As our 60 day window approached I gave my daughter who is going with me on this trip a list of what I proposed for FP+ each day and she agreed with it. When the window opened, I went through the process of making the FP+ selections by selecting options for morning times and then changing them to the late afternoon and evening times that we wanted. This was by far the most tedious part of the process, and I hope that Disney can come up with a way to make this quicker. But, the whole thing took me about an hour.
The one complication I encountered was because we both have APs, and I had made FP+ reservations for a short trip of 3 days with my wife in early November. That is where I ran into the 7 day limit for APs, so I cancelled the FP+ for one of the days in November (when I figured, correctly as it turned out, that we wouldn't need FPs) so I could schedule the 5th day of the December trip.
The process of customizing MB's took about 2 minutes. The only challenge was getting my daughter to pick a color.
All in all, I probably spent 1-2 hours more on planning than I might have otherwise. But, the tradeoff for that is knowing that I have 15 PM FPs lined up that we wouldn't be able to get otherwise on very busy days. The fact that we made our reservations before tiering is an added bonus, but I would have been happy even with tiers because of the crowds at that time of the year. I am willing to trade the one or two FPs that we might have used in the morning for 3 later in the day. Barring some unforeseen issues, it is nice knowing that we are guaranteed at least one ride on all of our favorites on this short trip.
I want it to be maximized to the best of my ability. After all, this trip cost more than my first (or second) car!!! 
