All are excellent! I love the color lights and stunning reflections. With night shots (and post processing) I always find it difficult to find the right brightness - do I want it to look really dark, cause it was night, or do I want to keep the sky bright. That's why normally I prefer blue hour to the proper night. #5 would have been just average if not the blue lights that add so much to it!
All of them look sharp to me (at least in the resolution you posted), and I know how hard it is to keep long exposures sharp. The bridge is my favorite, really stunning! And I would choose #5 as my second choice

Great job!!