TBaraki, thanks for pointing those out, I had all overlooked them at my first glance of these photos (I was more trying to find out where you were, Chris, which was on Princes Street for the first two, looking towards Balmoral Hotel and Calton Hill) - but now that I have seen them, I like them very much, too.
All in all you have every reason to be happy with these!
It was black night already by the time you were out there?
Sometimes it is nice to still have a hint of light (i.e. detail) in the sky.
Balmoral Hotel is a tad dark in the second, but I like the ghostly shape of the people walking past, which would have become a total blur, had you exposed for longer, so it is a toss up between getting recognisable people-ghosts or more detail in the distance...