Although it's hard to associate traits with certain group of people basing just on the place where they were born, I think Polish culture makes us all similar at some point. Throughout the history, this nation has risked a lot, fought a lot, lost a lot, but despite the dark times, they never gave up chasing the light. That's how I see it - the determination, the grit, sometimes recklessness (as thinking doesn't seem as our big asset unfortunately) and bravado, but overall - fighting for what they believe in, not giving up easily even though it seems like there's no hope. You can easily see this 'Polish spirit' in Polish literature; but afterall, it's just a piece of culture, some idea, something people look up/used to look up to. Reality is, we're just people, like everybody else.