My sibling and their significant other are those sorts of people - both made it very high up their respective professions by their early 30's, but when it's time for the Christmas get together, it's a pissing contest about "Oh, I'm only working 70 hour weeks, so I've had some relaxation the last little while." There's little identity outside of work, amassing the cash, then taking vacations with the money, and turning around and doing it all again.