That's interesting because I find MA drivers easier to take than Upstate NY drivers.
In MA, drivers all drive fast and just do what they need to and seem to not take it personally.
I don't hear the horns blowing and brakes squealing when someone changes lanes at the drop of a hat.
Here in Upstate NY, you get the range from driving 10 MPH UNDER the speed limit to more than that over and people are more aggressive instead of assertive, and they are RUDE. They'll cut you off just to make a point, when there's no reason to.
Interestingly, the Thruway, (the 90) is better than I-81. I don't have a clue why, but there's just a difference between how they drive the two interstates.
Never really drove on I-81, so I can’t say. I have never, though, seen nastier drivers than in Boston.