I write by hand and I also keep a "mad journal" on my computer. I like the ability to choose which fits my mood best. Sometimes when I am really angry and just want to get a whole lot out quickly, I like to pound on the computer keys. And then when I am in a more reflective, explorative mood, I like to write by hand in my journal. I personally think what is most important is to use journaling as a tool and to get in the habit of doing it. It is very effective.