I'm a semi truck driver and I have a god's eye view over all of you people.
And I will tell you, anecdotally, that large pickup drivers are the most aggressive and intimidating. I thought that's the whole point of those things, with their big boy yellow clearance lights, giant mirror arms (I actually have to watch out for those) and fat ass dually wheel wells.
Sometimes they'll even tailgate me, trying to intimidate me into doing ... something? Which is so cute.
Then they'll finally zoom by me, roaring the engine to let me know how annoyed they are, as I trundle my 15 liters along at 1500 rpm.