Handwriting is one of the easiest methods by which you can practice fine motor skills and manual dexterity.

Also, I really enjoy watching a thought literally flow out of my body onto a page. There is something very disconnected about pressing keys on a keyboard to see the words appear on a screen -- sometimes I find myself in a state of flow on a computer where it all seems to 'click', but contrast that with handwriting and I can get right into flow the instant graphite or ink meets paper.