Underrated: tourist culture.

Touristy things in Sydney are actually quite fun for a day out, even if you live here. People travel here from all over the world to do things that we ignore. The Aquarium is absolutely wonderful, as is the Art Gallery; Luna Park is a good half day of Pirate Ship rides. Or just see the city itself: ferry rides across to Manly, a walk over the bridge, or a stroll past the Opera House and through the Botanic Gardens. On the weekend, the city has a completely different vibe, so if you hate it for it's traffic and intensity, spend some time doing fun things and exploring the place.