That's a very nice one! I also enjoy programming ligatures.
I use Cartograph CF. I like to use the handwriting style for built-in keywords. Those are common enough that I identify them by shape. The loopy handwriting helps me to skim over the keywords to focus on the words that are specific to each piece of code.
I wish more monospace fonts would use the "m" style from Ubuntu Mono. The middle leg is shortened which makes the glyph look less crowded.