For some reason lately, my brain wants to compose longhand. Once upon a time, I composed everything in longhand. I would get up before 5 and write the next scene of my novel; usually on unlined paper, scrap printing paper I brought home from work, that sort of thing. That night, after work and dinner and rudimentary life, I'd type up what I had written.
I can't actually remember my reasoning at the time. I do remember being quite cold in the morning, wrapping myself in a blanket, poring over the desk with its solitary lamp. But I don't remember why I wasn't using the computer; perhaps it was normal for me to compose longhand. I remember writing most of my university reports, including my theses, by hand. I found it easier to think of the writing, to structure the prose; the computer was the polishing and publishing and finishing part.
Then — and this was definitely during the writing of the first novel — I became frustrated with the slowness of it all. Writing it up and then typing it up? Took too long. Writing longhand itself? Took too long, my thoughts were racing ahead and my pen couldn't keep up. But, being a touch-typist, my keyboard could. So I started composing straight on the screen, and I've been comfortable with that process for a good long while now.
Until now. Apparently I'm feeling the need to write slowly again. I wonder if perhaps I'm poring over my words too much, wanting to write slowly; but at the same time my first drafts have much better sentence-level work than before. You win some, you lose some. At the same time, I find myself desperately wanting to do my novel revisions on-screen… but that's just because I want them to go faster, faster, faster (will they never be finished?).