Alba, I was already happy when I saw your name on Hearts Affire exchange list, but now I am really excited! I love eucalyptus. And all those others look really neat too. Canada is pretty limited in its stamps. The occasional themed edition is released, and they can be pretty, but selection and creativity are limited. One thing we can do is pay a little more and make our own by submitting a picture. So I treated myself last year to test it out. 
Ahhhh! So those were your own art-stamp!! So amazing!
In Spain you can personalize too. Prices are high though. Normal domestic stamp: 0,60€, personalized domestic stamp: 1,49€. Normal International stamp: 1,50€ Personalized International stamp: 2,39€. They basically charge 0,89€ per stamp, plus its face value. And you only can purchase in multiples of 25 stamps. And you cannot use a photo of yourself dressed as a queen
