When FP+ first came out I was not a fan and was even very upset at the thought. However, after having gone twice for 10 days each with it and one 8 day trip to DL without it, I can say without a doubt, we absolutely love the FP+ system. We get to the parks at either rope drop or during EMH and ride everything we can. Our fast passes are scheduled to start around 10:30 and we do them back-to-back. We then either make a FP for the same park early afternoon or if we want to leave we will check what is available at another park and hop there. Our last trip we hopped into Animal Kingdom to ride EE and to MK to ride Space Mountain and then got a Thunder FP after that one. We rope dropped TT one day, then rode it with a FP a few hours later, then got a Soarin' FP after we did our two 2nd tier FP. I really love being able to secure a FP in another park before hopping to that park. Before, you would not know what was available until you were actually there. We also love that on arrival day, you can walk into a park and ride 3 headliners before bed.
We don't mind the tiers because we only go for 9 days or more, so we go to each park at least two mornings and FP a different attraction each time and rope drop or do EMH for the other. We have gone early June every year and have always been able to ride the less popular rides with no more than a 30 minute wait. We do shows during the early afternoon or sit and people watch because they usually don't have a wait any longer than the length of one show.
When we visited DL and returned to the old fastpass, it was quite a shock how much we missed FP+. If we wanted to ride the Racers in DCA we had to be at the park before 9:30 to ensure we got a FP and it generally would be a return of several hours later. Standby was always over 90 minutes and often over 2 hours. Tower of Terror was the same way. We would have to go all the way over, get a fastpass to return a few hours later or discover that we couldn't return at the return time. Pirates, Peter Pan, Haunted Mansion, and Matterhorn didn't have FP at all and the waits for these rides were often over 45 minutes so we were wishing for FP while we were there.
Of course everyone has there own way of touring and are interested in different things. We simply love the parks. We get there early and stay late. We rarely take a day away from the parks when we are there. We love most of the rides (even the carpets and small world), the shows (except the TIKI Room - just don't get the appeal), the sappy entertainment, and all the nighttime shows. We even like to watch other people's kids and the awe and joy they display so having an hour without a ride does not affect us. We will simply get a snack, window shop, or watch someone else have fun. We are definitely not hard to please, so my opinion may not count for much.