My fav shot would be #2 if it were sharper, also it looks tilted to the left. I really like the color of #1 but I would probably recompose that shot without the attractions and see how it comes out. I'm not really digging #3 at least not from that angle.
My wife and I were in Sydney in 2001. I wish I had my DSLR back then. But I might never have gotten past the opera house. Nice shots. Beautiful place, beautiful country.