How Do You Sign Your Name?

 I've seen a few paintings that don't have any signature at all.  The last time a Monet exhibit was in St. Louis, I learned that the family signed for him.  I thought those signatures looked too perfect (they were a stamp)!  When I began doing my colored pencil work and framing them for the gallery I signed my whole name:

                           
                                                  Three In A Jar 6 x 6 Buy this painting on Etsy

Lately, I've been playing around with my signature.  I looked at a lot of other artists - wow, what an array of styles!  Initials only, last name only, first name only, you name it (sorry for that).  I thought about a qr code:

                                                 
How cool would that be?  But I finally decided on using my initials:

                                                 Blue Butterfly 8 x 8 Buy this painting on Etsy

How do you sign your name?