I am Latin American also (Brazilian) and my girlfriend is Polish.
I Found interesting because i almost don't feel any major cultural shock (more like a weather shock? haha). Actually both cultures fit very well (maybe because poles also mass-emigrated to Brazil during the last century and helped to shape part of our culture).
The only Latin thing that i realized poles really don't like is unpunctuality... they take that a bit serious.
Also people there in Poland are a bit more conservative (more than Brazil, but probably not more than Mexico since Mexico is also much more conservative than Brazil). But this is not bad, since it is the way they found to preserve their way of life.
I Spent few months in Poland and i travel there on a monthly basis and until now i felt very welcome by absolutely everyone.
Joking apart I've been to Spain, However the Hispanics there are not as friendly as the Mexican Hispanics.
Haha totally not.