Previously, I wrote about the Sapir-Whorf hypothesis, the idea that your perceptions of reality are influenced by the language(s) you speak. Here’s why I bring it up: programming languages, while not languages in the technical linguistic sense, are definitely wibbly-wobbly languagey-wanguagey stuff. Programming is a communicative act.
So strive to be a programming polyglot. Don’t do it because it’s good for your resume, or because it’s a fun puzzle, or for bragging rights (though these are all fine reasons in themselves). Do it because it rewires your brain to more deeply perceive reality. Learn a language that’s really different than the ones you use every day. Explore the bizarre impractical ones. Embrace the headache.