As a child one of the things that attracted me to stamps is that they can be very pretty, especially in an array. I never outgrew that. To this day I am drawn to the visual attractiveness and colors of stamps, and miss that dimension in the collecting of the covers whose stamps I do collect.
Lately I have been studying the grills on my Banknote issues, and in the course of doing some closeup photos, chanced to put an array on my screen that made me happy to be studying these stamps in particular. Try to imagine the image below filling the screen of a 24" monitor.

I just had to share it.