I used to do all my writing longhand (then type it up) and always said I could
never do first drafts onscreen. I do now though! partly because at some point after getting onto the 'net in the 90s I found I felt very cut off from my online world if I was away from the pc too long.
I never go anywhere without a notebook and pen though and have been known to get up from bed to scribble down a wonderful thought or bit of dialogue as it came to me pre-sleep, having learned the hard way that however convinced I was that it was
so brilliant I would never forget it, it had invariably vanished by the morning. Of course this means that when I look at it next day it is sometimes not quite so brilliant as I thought