If you compile a list of idiomatic expressions from a given language and organise it by recurring themes, you will soon discover (or have confirmation of) some national obsessions. Here are a few British examples.
What a storm in a teacup! If making such a drama is his cup of tea, tea and sympathy are as useful as a chocolate teapot. I wouldn’t get involved in any of this for all the tea in China.
They make such an odd couple… He always complains of being under the weather and his perspective always seems to be that it never rains but it pours. When invited to a party, either he takes a rain check or he has to rain on everyone’s parade if present. She, however, is always as right as rain and happy to join the fun, come rain or shine.
One minute he’s stumped about this sticky wicket and the next he acts off his own bat without anyone knowing what he’s up to. This has now put the project on the back foot. It’s just not cricket, is it!