Rich people and houses

Back in the day rich people showed off through home design by having stuff like:
A giant back yard with landscaping around a huge pool.
An ornate dining room that could seat 20 with crystal chandeliers.
A 6 car garage for the Rolls, BMW, etc.

But today I'm looking at a WSJ feature about closets. Friggin' clothes closets off the master bedroom. The biggest was 1,300 square feet. WTF? How much time do you spend in your closet? How often do you show guests your closet?

So, it got me thinking. If somebody gave me $300,000 with the stipulation that it could only be spent on designing ONE room in my house which room would I pick? I'd go with the kitchen. What say you?