My handwriting is atrocious, I always start trying to write neat in my journal, if I'm hypo then it gets pretty wild, the size, shape, embellishments take on a meaning of their own! It's a work of art (not!) If I'm depressed it gets smaller, but not so crazy.
When I take notes or write comments on papers it is a scrawl, but every one at work has crappy writing so they can read it!