It's sound very... irish. I'm surprised how different it sounds to what I've listened all my life in mexican music. Definitely an underrated instrument.
There was a man from my city who made me (and millions of people more) like the accordion. He was called "El Rebelde del Acordeón" ("The Rebel of Accordion"). There are no people who won't think of him when the accordion is mentioned in Mexico. Here are some videos