An important point from all definitions above on luxury goods, is that they are products mostly used by the upper class and are not a necessity. If this is so, would it make sense for aspirational people not in the upper class to save up to acquire them?
I am the theme! That is to say, what you see here is art that I like. So, in that sense therefore, what you see here reflects my taste, my passion, what I find attractive and, in a sense, therefore defines who I am. There is no common theme running through it. I collect deities, I collect sculpture and all kinds of art but one thing that is common to all of them is that I like them, and I could afford them at the point I bought them.