Congratulations on your first 6+ score and in a 600+ image Free Study to boot. The lighting and color of this image are very well done and a pleasure to look at. The composition and perspective is also well done. The only suggestion I have for improvement would be to mask for the sky and tweak the post processing to bring out the clouds and darken the sky slightly. I think this would provide a bit more depth to your image visually. I could be accomplished fairly easily by bumping the gamma in levels, decreasing the brightness, and increasing contrast.
Feel free to PM me if you have any questions regarding this critique.
I can't remember ever having seen the bay bridge photographed from this angle. I like how the flow goes back under the bridge and over towards Oakland, too bad the island(the name has left me right now) breaks that flow a little.
The embarrassing part...I looked at this for a little while trying to figure out from which side of the bay you took the a photo of the Golden Gate Bridge. Not only are there too many towers, but you even say Bay Bridge in the title.
Oh, in all that babble I failed to say...great photo!
A night image with a sepia tone... I dig it. at first I didnt, but I stared at it for a few moments, and I can see why you chose to do that. Its amazing how different it looks by night, isnt it?