When I'm developing or filling in forms, often I just type random characters for testing purposes. My pattern of finger activity tends to involve the keys "asdf", though I see alot of user names on HN that are "KKKKKKKK{something unique}". Both seem reasonable considering where hands are naturally placed on a QWERTY keyboard. Though every time I see a string of Ks I can't help but think of the racist organization so I guess that keeps me away from doing that "easier" approach.

I'm curious to what your fingers naturally do?