Don’t stand too far away, but don’t stand too close either. For both perspectives are likely to have an obstructed view. When you’re on the Brooklyn Bridge, you cannot see it all, but you get a pretty decent view of the Manhattan bridge. Because the only other time I’ve seen the Manhattan bridge up close is when I’ve driven on it, and it’s not that impressive. The Brooklyn Bridge has been under construction for quite some time now, reducing the walking path to half it’s size on the side closest to Manhattan. So I suggest only walking on the side closest to Brooklyn or finding a cold night to walk across the bridge.