Helen of Troy being played by Lupita Nyong'o. As a Greek myself, it does bother me & almost every other Greek I know, as it's simply not historically accurate. Lupita is very beautiful, but she's not Homer's girl.
People from ANY other kingdom or race in ancient Greece were ending up becoming slaves. I believe that it's beneficial to show how BAD things were, rather than adding a modern cultural spin to it. The ancient world SUCKED. Fact.