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.
Oh this! YAML was a terrible choice. And that’s coming from someone who likes Python and prefers white spaces over brackets. YAML never clicked for me.
What you mean you can’t easily tell what this is?
- foo: - - : - bar: baz: [ - - ]