I've been lucky to travel to a hell of a lot of places down the years and the one city that stands out head n shoulders above the others is Sydney. Absolutely the best place on the planet for me. So geared up for family,sport and beer :) The travel system is amazing and the beaches second to none. And if you invest a bit of time with the locals,they're decent people. Unbelievable place! Worst..Mmm It's not a city, but took my little girl to Pickafort in Majorca about 5 years ago. They were the most horrible people I've ever encountered! Ignorant,rude and really hated the English. I'll never visit Majorca again. Worst City? Don't really have one tbh, although I'm not a big fan of London.