Re: Going metric
Ahhh, you thwarted my evil potential gotcha! I'd wrongly assumed you'd still be using imperial for those, and I would have gotten away with it, too, if it wasn't for you meddling kids!
I never did imperial measures in school, and whilst I use metric for smaller lengths, I still use miles (and hours!), and feet/inches/stones/pounds for height and weight.
I was originally a gallon person too, but was too young to drive back then. I couldn't deal with anything but litres for petrol now, so I guess it's what you're used to in every day life (though people still using Fahrenheit need to be shot!)