Despite being born just before the UK switched to decimalisation much to the despair of my engineer father I still use lots of imperial units. I grew up with pints of milk on the doorstep and buying petrol by the gallon. We were measured in feet and inches and weighed in stones. Recipes (like this one for cakes) were in ounces and food was bought in pounds and ounces.
The only reason I know that I am 173 cm tall is that I went on a school ski trip to France and had to get measured for skis! As for everything else I've got used to filling my car in litres but on the whole my mind still works in imperial. It doesn't help that most of my favourite recipe books are still pre-metric in their measurements!
With two children currently at school I'm doing my best to try and stick to metric measurements. They know their heights in metres and centimetres and I haven't confused them by converting into feet and inches. When we measure the size of other things I try to remember to use the side of the tape which has centimetres on it.
Anyone else find it a struggle to get with the programme and use the correct units?