Love SF, been there twice, once with better half, and once with the kids as well.
More expensive to live then Sydney says a lot...cheaper to spend a week there as a tourist than Sydney by quite a margin from experience.
One of my strangest experiences while over there was when we took photos of the Bohemian Club, and there was a veteran begging (well he was wearing uniform and claimed to be a veteran)...I explained that I didn't have change (true), and he offered to make change for whatever I would give him...guy in a box up the street from the Nob Hill hotel (the quirky one, everyone should stay there for a while) was happy to have our empty bottles and cash them in the vending machine.
Had lunch with mori too (the real mori, not the scarlet pimpernel that people see under every bush).