When I measure things, my units are...
For me, I'm a bizarre mix. I grew up in the middle of the conversion process, and I think in miles for long distance, cm and metres for short distances, centigrade for winter temperatures, farenheit for hot days, and measure out liquid in ml, unless it's a pint.
So far as I can tell, kids nowadays are entirely metrificated.
Context being this push for the USA to finally join the rest of the planet.