Pen
Pen, or mechanical drafting pencil, for pretty much all first draft work. It just works better, and there's some pretty substantial scientific evidence to back it up.
I've always thought some of the main reason people give for using a keyboard are the exact reasons a keyboard is not the best choice. 1. It's faster, and my hands can keep up with my thoughts. Not, to my way of thinking, a good thing in any way. Think twice, write once works better. 2. Cut and paste. Cut and paste may help with final drafts, but I think it misses the whole point of writing fiction. 3. Using a computer is easier. Well, faster, maybe, but not easier. And since when does easier equate with better? 4. I have lousy handwriting. That's because if you don't use it, you lose it. 5. The first draft is going to be crap, anyway. Only if you want it to be crap.
Besides, it was good enough for Shakespeare, Twain, and Dickens. And it's good enough for Neil Gaiman, Joe Haldeman, J. K. Rowling, Tom Parker, Elmore Leonard, Neil Stephenson, Wendell Berry, Samuel R. Delany, Tanith Lee, Ann Tyler, and simply dozens and dozens of other very good writers, so I'm in good company.
As far as I'm concerned, the best word processor on earth is a Luddite Word Processor. It beats Word and WordPerfect all to pieces fof first drafts.
Stephen King even wrote one of his recent, and extremely long, novels with a fountain pen.