A lifetime of hording, that is sizable if horded in one room, or one level, or one house. Add the same amount of years of patina over (dust some would say) and you have a pretty good idea of my space. A place to let one's imagination loose.
Where the visitor feels free to make a mess and not worry about it. Work on what one fancies. It has everything one would need, and more, much, too much more. It feels perfect to "this person".
You have the children's projects hanging on the window's corner, the stacks of yarns, the inspiration board with multiple must do projects, the collections of whatever this person collects, the large amount of books on shelves and close at hand on the floor, the gifts from loved ones, and then of course the memories.