I don't see why you wouldn't want a fast pass for your favorite rides. When we went to Disney a year ago, we weren't able to ride Toy Story Mania or Soarin' because of the wait times, and an inability to get a fast pass (by the time we got to the kiosk, they were out). This trip, we have scheduled fast passes for these rides, as well as Anna and Elsa (no way will I wait in line for two hours for this, so with no fast pass, this would have been a miss), and for the Dwarf Train.
Tour how you like, but I'm looking forward to my trip even more knowing that my favorites are guaranteed.
I don't understand how scheduling fast passes will take away your enjoyment of the parks. Schedule them, and don't use them if it doesn't work with your day.