Photo 2 is warmest and looks most reconciliatory, while the cloud in PHoto 3 - whoa! - looks really menacing. But the colours are just great, great, great. The motion blurs in the moving tourists show that it must have become quite dark with that thick cloud cover moving in!
In the first photo I like the reflection of the sky in the puddles, but couldn't you have sawn off that street light before you took the photo?
Good pictures, the opera house against that sky is great, with nice lines leading to it, very dramatic. Really like the second one also, nicely framed and just the opposite mood of the last.