I have an AP which has park hopping built in, but if for some reason I had a regular ticket, park hopping would be very important to me.
We might visit three parks in a day, but not all day every day.
We'll go to breakfast somewhere, then go to a park for maybe 1 attraction (mainly to use as a transfer point to get back to our resort), then back to the camper or room for a good part of the day, then off to a park just before dinner, and do 1 or two attractions, then after dinner it's off to the evening EMH park. That is when we do most of our touring. We especially love MK from midnite to 3am!!