I'm far from ultra rich, but I like that many of the items in my apartment have at least little bit of story behind them or their makers and are not just being purely functional or decorative. Not that I feel the need to tell the stories to anyone, but at least to me, this gives the space a lot more soul, than if I just had hired an interior designer filling it with stuff or got complete IKEA sets.

I live a fairly "minimalist" lifestyle (I don't subscribe to the ideas of minimalism, the Swedish "Lagom", "just the right amount", is closer), so I can spend more on fewer items, maintain them and have more time selecting, making or commissioning them.