Is there a difference between ability to contribute to society and willingness to serve society? "Meaningful" contribution is a tall order.
Flip flops are nice to have around water/pool/beach? FF is cheap to make, fulfill the basic needs of many 3rd world countries.
Diet Coke - The first word came to mind - addiction. An inexpensive stuff to get high without worry about calories, assuming there is no side-effect.
Art is a personal interpretation of life experience. Art history facilitate our understanding of the past?
Longhorn football - I was dumbfounded when Memorial Stadium was updated without keeping any of the original facade.
Supply and demand? Youth and maturity? Aspect of life...
There are more shades or gray than I can imagine. Be open minded
Having a dinner with your spouse without saying a word to each others at age 80. Importance of holding hands.