Excellent work Peter! My favourites are the first and the fifth, but they're all really good. The blue hour is probably my favourite time to shoot
Not sure whether you're interested in feedback, but I think the fountains shot may be slightly tilted, based on the flag poles and the buildings near the centre of the shot.
I stayed at a hotel nearby last spring and shot some lovely photos of Gehry buildings (in rain) from the terrace of Hyatt, but didn't check the views right around the corner. big mistake, I'd love to have shot this view back then.