Like many others I hand piece because it gives my hands something to do and occupies my mind. I feel more comfortable with something in my hands to do. I have never been able to just sit and relax.. if I have something to do I'm much more likely to relax and enjoy myself..
If I have nothing I get jittery.. and then anxious and then grouchy.. no one likes me that way including me.. plus, it's portable.. I can always have something with me.
To me having handwork is like a soothing balm.. I'm happy with it and miserable without it!