What's the most frivolous thing you want to buy right this second? Say, someone came up to you and wrote you a blank check; but the rule was that you could only buy one thing and it could not be practical in any way. Lessons in something you have no real use for are ok, as they count as one thing. No paying off debts, nothing related to basic necessities. This one thing you buy is solely for the purpose of your enjoyment and your enjoyment alone.
I'd probably hire Ang Lee to throw a party as beautiful and extravagant as the 2008 Olympic opening ceremony and watch over it like Gatsby. What does that say about me? Probably nothing good.