Really makes me wonder what drives him. For many people it's the money, but with him it doesn't seem that way. But I haven't read too much about him, so if anyone has insight I'd love to hear about it.
His personal life is much more complicated though - impossible to know if he was happy or not, but for sure it was not usual.
The score keeping aspect makes it interesting, just like playing tennis while keeping score is more interesting than just hitting a ball back and forth across the net without counting.
Warren Buffett wouldn't be where he was if he wasn't obsessed with money. But to your point, that doesn't have to translate to material goods: the bigger house, yachts, etc.
When I was younger I rented furniture from a company called CORT. I happened to notice on the contract or receipt or something, that it was a Berkshire company (I didn't know that before then).
If I were Warren Buffet, I would have been happy to know that someone was a satisfied customer of one of his companies. I got some decent furniture for a few months at a reasonable price.
Just like I'm happy when someone is a satisfied user of my software.
If he believed in them as an investor he helped build the companies.
He took Berkshire Hathaway, a struggling textile company, and transformed it into one of the largest and most successful conglomerates in history.
You can see this behaviour in online multiplayer games that have a currency aspect --- some people will spend almost as quickly as they earn, while others will save some and buy items as they can afford, and then there are those who will just keep saving and saving, rarely buying.
There was a cool fact in there that he sees every price tag as the opportunity cost with compounding interest.
Also, given that he is a billionaire, I do kind of assume that he has paid money to upgrade his home at some point, probably also owns additional homes elsewhere, maybe has done other things with his vast amount of money that normal people don't do, that are still consistent with living at the same address as when he was 28.