I like Imperial for a few trivial things.
Measuring height of people in feet/inches is easier for me, as is weight in stones and pounds (I don't get on with the American way of describing weight in just pounds though, like someone is 160 pounds, rather than 11 stone, 6 pounds).
For pretty much all other situations however, I would prefer Metric because it's easy to convert.
My biggest issue with working in Imperial and Metric together, is that I can't visualise a mile very easily.
Whereas I can visualise a kilometre, because I know how long a metre is.
But unfortunately, distances between towns and speeds are given in miles/mph. And I am useless at converting between kilometres and miles.