What’s your travel style: serendipity or advance planning?

I also love to plan and am knee deep in what will be our kids’ summer of 2019 first trip to Europe. I like to have a PLAN for day 1, ideas for day 2, and day 3 etc in a location open to whatever comes up even if it is just sitting and reading. I usually require a nap every day and am just not up for 15 sights in one day. I also like nature and try to fit that in just about wherever we go. We are relatively new to Airbnb and I really have enjoyed how it impacts where we will go/stay/what we will do. Much better than a hotel. My teens are going to be surprised at the variety of places we are going to stay.