Like my normal, everyday handwriting. I don't have a special signature script.
IN SERIO FATVITAS.
-τὸ γὰρ γράμμα ἀποκτέννει, τὸ δὲ πνεῦμα ζῳοποιεῖ-
My signature is big and would probably be interpreted to be the signature of a very outgoing person. And yet I really am a big "I". Funny.