Inspiration - Stamps

After I started researching my topic, which is British female scientists, I turned to looking at inspiration from existing stamps. I was able to find examples of stamps that focus on novels from British writers, and British explorers. 

Along with the British stamps, I looked at stamps that I find visually interesting or pleasing to the idea. I personally find the first three stamps above rather bland and dull because the colours are rather diluted and the compositions are very straightforward without interesting angels or perspectives. When it comes to my stamps I would like to make them look like they have life with the colours and composition.