Re the best bridge to bike over in NYC. You are right about 1 thing: It is no contest.
The best bridge in NYC to bike over is the Tri Boro. Period. No contest. I have benn cycling most NYC bridges since before the word Yuppie was invented.
True, the Williamsburg Bridge may be "the best bridge to bike over and see Hasisim and Hipsters." But, the category is "best bridge to bike over in NYC." That would be the big T. The triboro is the aorta of the City, and it has by far the best view of Manhattan from any bridge. (Alas. The Village Voice for White People Born Elsewhere.)