All of my domestic DIY construction and repair activity is calculated in feet and inches - that drives my teenage son mad, as he doesn't understand a word of it.
Chris, age 55, 6 ft, 34 in waist (on a good day).

Whereas all mine are done to metric units, because there's more of them, and they follow a logical sequence. This infuriates my wife, who thinks it far more rational to base the size the piece of wood she wants on the distance between nose and arrow for a randomly selected mediaeval longbowman, divided by three, then by twelve, then by up to 64.
Congratulations on your recent 200th Centaday!
Edit to correct units
I am soon to enter the world of Superkilodayuation.
FT,N! (1.88m, 85Kg and rising).