Looks nice! Though maybe a polarizer would help as the cranes look too white in the picture because of the direct sun on it.
Is this taken near the Jack London Square by any chance?
The Golden Gate picture is perfect. Very nice composition. The Bay bridge shot on the lower left has great panoramic effect. Maybe if you took the picture later in the day when the sun is behind, it might be better - you can see the sun reflecting off the water quite a bit. Try taking these pics at twilight with a tripod, I bet it will come out amazing
