What cultural faux pas should I try to avoid making in Crete?

"In Crete, Greece, it is considered rude to rush or push people to do things quickly, as they value a relaxed pace of life. Avoid discussing politics or the country's economic situation, as these are sensitive topics. It's also considered impolite to refuse food or drink offered to you, as hospitality is a big part of Greek culture. When visiting churches or monasteries, dress modestly and avoid wearing shorts or sleeveless tops. It's also important to remember that Greeks are very proud of their culture and heritage, so avoid making negative comments about their country or traditions. In terms of gestures, avoid waving with an open palm, as this is considered an insult. Also, don't raise your hand to signal a waiter, as this is seen as rude. Instead, make eye contact and nod. Lastly, tipping is customary in Crete, so be sure to leave a small tip at restaurants, cafes, and for taxi drivers," said another expat in crete, Greece.