They are beautiful, I remember when I was younger I practiced calligraphy (with English letters like this:
http://image.linotype.com/samples/text/257097.gif
but sometimes even like this:
http://www.militarysabers.com/images...lish-large.jpg )
But it really hurt my wrist and took a lot of work to get even reasonably good at it. I could imagine with kanji it would be even harder, some of them look incredibly intricate!