¡I love the Spanish upside-down exclamation and question marks! ¿Don’t you?
I’m serious. In fact, when taking notes or otherwise writing by hand (pretty rare these days), I use ¡ and ¿ in my English. Both marks give the reader a useful heads-up that a text is about to depart from simple declarative prose. It’s surprising that ¡ and ¿ haven’t caught on beyond Spanish — not even in Catalan or Portuguese.