Originally Posted by
carpetbagger
I always open my passport with the pages of the cuban immigration stamps (I ask always to stamp my passport and not the paper they put in) while entering the US and show it to the US-Immigration officer.
Most of them, especially when they are latinos, appreciate it.
But I am a holder of a german passport.

My only regret during a trip to Cuba a few years ago was I didn't get my (UK) passport stamped. Other members of the group I was travelling with were apparently asked if they wanted their passport stamped on leaving Cuba. I was never asked possibly because of the number of US immigration stamps I had in my passport.
I lost the opportunity to add a Cuban immigration stamp to my collection of visas from "dodgy" countries including Yemen, Iran, Libya, Syria, Lebanon, Ethiopia...

My passport ran out of blank pages soon after my visit to Cuba and my current passport is a lot more boring.