For balance, we are talking about lens tests, and then it would be either to take many photos of a static object, such as a puppet on a table, or maybe of a brick wall, or something like a glass of water with a straw in it ... etc. Taking 50 photos of a glass becomes also quite boring after a while. As a Dad, you might as well take photos of your child, with the expectation that some people will get bored of seeing your child'sphoto, but in the end, the main purpose was the lens being tested.
I would say, there is nothing perfect for everybody here. So what. We can always opt not to look into a specific thread if it appears to be boring to you.