What's your favourite postage stamp?

Any of these, for me.

https://www.google.co.uk/search?q=postage+stamp+with+cat+on&tbm=isch&imgil=PeqXkYxR9orRoM%253A%253BE4BqHuhOpM00HM%253Bhttps%25253A%25252F%25252Fwww.pinterest.com%25252Fpin%25252F80220437084418456%25252F&source=iu&pf=m&fir=PeqXkYxR9orRoM%253A%252CE4BqHuhOpM00HM%252C_&biw=1536&bih=731&usg=__QlNlC5IDN63BKWqz1376NGyowZg%3D&ved=0CDEQyjdqFQoTCNWpzv3IhscCFWJZ2wodMcUIqg&ei=Dgu8VdXqFOKy7QaxiqPQCg#imgrc=PeqXkYxR9orRoM%3A&usg=__QlNlC5IDN63BKWqz1376NGyowZg%3D

Penny Black.

The 8th at Royal Trron.

.
http://www.royaltroon.co.uk/courses/old-course/8

Penny Red, I have one. It's worth pennies atm.

Royal Mail Christmas stamp 2006 - Santa sitting on chimney

The Pope's head set, I think they may have been issued from the Vatican.

the concorde stamps from '67