> Are there any other "non-usual" recommendations for writing code?

Pretty unusual, but after years I finally managed to find an alternative to Consolas I liked enough in Oxygen Mono—albeit I turned down a lot of really good fonts just because they had too much interline spacing and I couldn't tweak in Sublime.

Pretty much no Unicode support outside of common accents (good for every European language at least) and common programming symbols, though. Still I edited in em and en dashes and never found it lacking since.