[FuzzyDunlop]

I can write things down and circle important bits as I go, or branch off particular points with other ideas; I can doodle little diagrams and annotate them; I can write annotated pseudo-code and little theories and ideas, and refer back to them on different pages, and so on...

If I type, all I can do with minimal effort is type. If I want to draw diagrams, or annotations, or brainstorm, I have to change to a different application, and use separate tools for each task, or otherwise spend more time formatting my document than getting my thoughts written down.

If I write, then I need nothing more than a pen and some paper and I can do anything, and I can do it fast without having to find the correct type of document to create, or the right place to save it.

Most importantly, I don't need a computer to do it, and it gets me away from my screen. And even if I never refer to the notes again, the satisfaction of doing it at all is invaluable.