Hum-drum uniquity

I hate it when new things, that were once wonderful and fresh, get old. I don't mean old in the sense that they're putting on years. I mean that they aren't new anymore, they are just things that I've seen and gotten used to. Like, my shoes, and my new hat, and my car, and my hoodie... it all gets old. Is it just the imprints of American society on my brain that makes me need to have changes and new things all the time? Or is it just my very short attention span that makes new things get old very, very fast? I don't like it though. It makes me feel spoiled and selfish. If I continually collect "new" things then where will I store all of the things that got old?