As "TheSouL" say, cactus is out of scene... . Well, in my opinion (I'm spanish) the bull is an exploited spanish stereotype.
On the other hand, Don Quixote could have been an excelent icon for the spanish stamp.
I don't understand the cactus, Spanish ar not mexicans. By the way, this stamp is really awesome, your idea with the sunset is incredible, I've no words for this.
Sunset is like a Spanish flag! Brilliant idea!
I like the feel of how it seems like a sunset. It is awesome!