An enjoyable class. I actually had all of these created and in my brush library, except the QR code so I used this class to follow along and createa QR code brush.   The only brush I use routinely however, is my signature brush. One thing that I like to add to my signature brush for my own personal information is a year created date.  I go in and update it every year. It can be seen inside the d in my signature. It's just nice to look back at my work that is online and know exactly when I created it. 

Here is a closer look at all the brushes working together.