I am one of those that since one way toll collection began, took advantage of that, by taking the 'free' crossing one way, and taking a cheaper return route. For example, if traveling from Queens to points south, I would use the Williamsburg Bridge, and Holland Tunnel. Returning via Outerbridge crossing, and Verrazzano Bridge.
Or, if going north, via GW Bridge, returning via Tappan Zee or Newburgh-Beacon, depending on destination...