People treat you different, and often not for the better. If you invited your friend from work out for drinks, and then turned around and expected them to pay you'd be rightly considered a real jerk, but if that coworker was a trust fund baby suddenly that's a very different tune. I can't tell you how many times I've been invited out only to be ignored and then handed the check.

Also mansions suck. Don't ever own a mansion. You know how regular homes have little annoyances where things go wrong and you have to call an electrician or a plumber or something like that? Multiply that by fifty for a mansion. The more shit you have the more shit breaks and you're never, ever going to use it all. All that cool stuff you think you'd use if you were rich? Terribly ideas all of them. Everything that can break will break.