I like my Harley Fat Bob for long hauls. It delivers 49 MPG on the freeway. For medium commutes, the Kawasaki Versys delivers 53 MPG on the freeway. For putting around town, I have a Yamaha SR400 delivering 66 MPG on regular gas. The Suzuki DR650 delivers 55 MPG on regular gas. A big, heavy bike is only desirable when traveling in places with strong wind gusts that would knock a lighter bike around with ease.
Wind pull/ mini-van/ semi truck vaccuum pull is something I did not think of.
And that is a valid point.
But, for me. My presumption of the trade off between that and weight/ stopping and cornering would not make up for it.
But there are a lot of people that really like bikes that only go in straight lines. So, I know I am in the minority.