The piano.
It's kind of sad (for me) that I never have picked up the keys, considering I've been making music for 20+ years. I can play the guitar and bass, and I know enough music theory. I know where the notes, chords, and scales lay on the keyboard, but anything else than simple melodies or chords just confuses me. My hands don't just work independently that way.
That actually looks pretty solid, will have to try it out.
I'm normally quite easy with fonts, for monospace it's usually Fira Code, but for certain tasks I like to use something different.
For instance, terminals usually it's ProFont, and for IRC it's Fantasque Sans. Fantasque Sans is kinda like Comic Sans.
Hmm... maybe I am a bit particular about fonts after all.