I do feel like I am getting too old for some stuff in my life. However I can admit I don’t really hold any of that stuff as particularly important either. So I collect comics, toys, and other things mostly because I enjoy having the stuff not so much to just show off. It’s true my apartment looks like a 9 year old with way money lives there but it’s all a big part of my personality also.
If a person is confident and understands what’s important I think it becomes part of the environment to spread that personality as away of expression. Like I could see someone who is a musician having lots of that spread around the home. Someone who paints will naturally want to have those expressions cover the walls. Same with collectors of pretty much anything.
You can say a great deal about homes and the people who live in them by seeing what comfortable methods they use. It’s interesting to think about at least in a outside looking in kinda way.