Hmmm.
I am not too keen on the
Opera House pics, i'm not sure why but perhaps it is because they are a bit cliched. Nice exposures and composition though and it looks like you have tried to do something a bit different, but of course that would be difficult with something that has 1,000,000 photos taken of it every day
The 'Mushroom like building on Martin Place' is very good. The use of B&W certainly adds some much needed interest to what is otherwise and ugly building. The angle is also pleasing and different to the 'norm'.
The B&W dragon has excellent composition but i feel it's a bit flat. This could be a fantastic photo if you can get a bit more Ooomph out of it. Maybe make it stand out from the background a bit more. Perhaps cut it out and lightne it up a bit and add it as a layer on a darker background. Just an idea.
Good pics all round. keep it up and post some more when you get them.
Thanks.