There are a couple I have in mind. Like many techies, I am a huge fan of RSS for content distribution and XMPP for federated communication.
The really niche one I like is S-expressions as a data format and configuration in place of json, yaml, toml, etc.
I am a big fan of Plaintext formats, although I wish markdown had a few more features like tables.
And whats the difference by using -22c to 40C? Not a nice ratio? If you grew up with Celsius, you wouldnt never felt something is amiss and just feel just as natural.