You will find more diversity in two American states e.g. Texas, NY, California, New England, than you will find in the entire country of Poland. Indeed, you will find more diversity in either California or NY than you will find in a large chunk of Eastern Europe.
Magdalena: The part about Poles having yellow teeth because of drinking tea? Disagree, I'm afraid. It's more or less a genetic thing. I brush my teeth like crazy but they're never gonna be snow-white.
Dentists advice not to brush too heavily. Else you could damage the tooth enamel.
many nations drink more tea and coffee and smoke then the Poles and still have snow-white teeth...
we take off shoes when we enter to someone's house - but it's common that your host will tell you not to do that - and then this is ok to not take them off ;)
yes...
skip the kissing. firm handshake is what you need.
yes...
remember when on a bus or public transport they will look down upon you if an old person stands next to you while you sit.
yes... let an elderly person sit down...
and if you are visiting somebody, don't go empty handed...
Cześć! Jak się masz? - Dobrze. A ty? Świetnie. Jak Ci na imię? - Mam na imię Aleksandra. Mam na imię Trevor. Miło cię poznać. - Miło cię poznać. Do widzenia. Do widzenia.