I completely "get" it. I have a major genealogy project - working on the genealogy of a town for their 150 year celebration in 2018. I started the research on the project about 35 years ago and have volumes of paper files that I have been gradually entering into the computer and validating the data via online and county records. I spend about 30 hours per week on the project. After awhile it gets tedious and I just want something to do just for the fun of it.
Hence, I have a separate tree that I started that just has the genealogy of the royal lines through history. I find interesting published histories and photos that I include in the tree. I just key in the birth death and marriage info and then have fun finding new information to attach. It is a nice break from the larger project and renews my energy and keeps me interested in genealogy. It isn't lost time either. I do have a tie to one of the royal lines (Sir Francis Bryan who was in the court of Henry VIII), so it is fun to see how the relationship calculator plays with the new entries.
I also have found my link to two of the "New England" presidents, so that ends up linking in to several others in interesting ways. Did you know that Hillary Clinton and Nancy Bush are related through a distant common link. I find it interesting when such ironic twists pop up in the tree.