One of my kids did DNA testing through 23andme.
I know, giving your DNA to the Internet. I failed as a father somehow.
One of the results speculated that she was not particularly affected by caffeine. We both found that to be true. Like you, I can drink a cup of coffee and go to sleep immediately.
Things like “preference for salt vs sweet” were all pretty spot on too.
I wonder what aspect of our chemistry correlates to those sorts of things.
If you can get past the privacy issue, you definitely get your entertainment value for the $100 or so bucks.
One of the results spilled out last names of people you were likely to be related to. My kid had never heard the last names of certain cousins and damn, it was a hit. Creepy