I love San Francisco, only been there once and loved it. This is a nice shot but for me it's too dark and the cropping could be tighter so there isn't as much darkness on the left. The focus is a bit too soft for my taste but otherwise this has the potential to be a great shot.
This is a familiar composition, but the range of tones is quite narrow here. Color may in fact have been a better choice, adn would help llift the skyline out of its background.
Clean and contrasting image. This is one of my favorites thus far. There's something to be said for B&W night shots. The only thing more I could wish for in this shot would be a little more clarity in the skyline on the right. Good luck.