I learned a great deal, processed a great deal about my x while trying to forge his signature. 

The lack of curve, the hard pin point of the angry slash, underlining with pompous emphasis his utter authority.  I got it.  His nature seemed so evident in these strokes.  I just couldn't quite get those hard lines.  I tried to emulate that utter conviction but
my hand kept changing, kept veering off track, kept exploring other options.

My own signature changes so much that I am often pulled aside in banks, like a common criminal might, to justify that I am, actually, myself.

But myself IS mercurial, bowed, oblique, effervescent .  As my signature changes right in front of the exasperated bank clerks eyes, they invariably eventually have to accept me as I am.  Non defined.  A shape shifter.