A: The Brooklyn Bridge is usually best…even when so much of the view along the way may be blocked due to bridge repairs. The view from the tower on the Manhattan-side is wide-open and worth the walk! And make sure you look up. The web of cables above is quite a site!
One more idea: walk across the Williamsburg Bridge for unobstructed views, a panoramic look at the Brooklyn Bridge, and a dedicated walking path (no need to dodge bicyclists on this bridge!). The only drawback is the noise from the J, M, and Z subway cars that make frequent bridge crossings.