Well, metric is based on 10 which makes it so much easier than Imperial.
I have tried to bake according to Imperial and it's really hard!

In the UK there was BIG fight because there was an EU legislation that was literally forcing the UK to start using metric in shops, for selling meat, cheese etc.

People were so angry. One grocer were actually sentenced to prison (not long, just a few weeks) because he refused to make the switch. People from all of England drove to his shop to to buy their groceries to show their support, so he made lots of money from it. He became a sort of anti-EU hero in the evening papers.

I thought it was brilliant because I was literally incapable of learning Imperial and suddenly I could say "Give me 500 gram of that" etc. Previously I had to guess at Imperial.

The shop staff was totally confused and did not know for example "hecto" or "decimetre" even though they are normal metric measurements. Everything had to be given in the most basic units that were on the actual scales or ruler, or they were confused.
Rather funny for me and all the French and German expats in the area were I lived.

Then suddenly they changed back.. Imperial became allowed again, but the good thing was that you could continue use gram if you wanted and as a result I never used metric.

British TV news always give temperatures in both Celsius and Fahrenheit. I have no idea why they can't make up their minds and my vote is obviously on Celsius even though I have a basic idea of Fahrenheit by now.

Another really dangerous thing is the left hand traffic in the UK.
It is both INCREDIBLY dangerous - people die every year because of this! And expensive for people who cannot continue using their car if they move between the UK and another country, because the steering wheel is on the wrong side.